CN202090836U - Double-fin type drilling bit used for in-situ remediation of contaminated soil - Google Patents
Double-fin type drilling bit used for in-situ remediation of contaminated soil Download PDFInfo
- Publication number
- CN202090836U CN202090836U CN2011200581711U CN201120058171U CN202090836U CN 202090836 U CN202090836 U CN 202090836U CN 2011200581711 U CN2011200581711 U CN 2011200581711U CN 201120058171 U CN201120058171 U CN 201120058171U CN 202090836 U CN202090836 U CN 202090836U
- Authority
- CN
- China
- Prior art keywords
- fluid jet
- double
- drill body
- jet pipe
- fin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002689 soil Substances 0.000 title claims abstract description 53
- 238000005553 drilling Methods 0.000 title abstract description 19
- 238000011065 in-situ storage Methods 0.000 title abstract 2
- 238000005067 remediation Methods 0.000 title abstract 2
- 239000012530 fluid Substances 0.000 claims abstract description 63
- 238000000034 method Methods 0.000 abstract description 9
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000003756 stirring Methods 0.000 description 9
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000005065 mining Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 210000000515 tooth Anatomy 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
Images
Landscapes
- Processing Of Solid Wastes (AREA)
- Earth Drilling (AREA)
Abstract
The utility model relates to a double-fin type drilling bit used for the in-situ remediation of contaminated soil. The number of fins is two and is identical to the number of fluid jet pipes; the two fins are arranged at the lower end of the middle of a drilling bit body; the fluid jet pipes are arranged on the center line of bottom axial lines the fins; cutting components are distributed at the bottoms of the fins and the bottom of the drilling bit body; a drilling bit body core pipe is arranged in the drilling bit body and communicated with the fluid jet pipes; a plurality of jet orifices are distributed on the fluid jet pipes uniformly; and the drilling bit body core pipe, the fluid jet pipes and the jet orifices form a fluid conveying path. The double-fin type drilling bit has the characteristics of reasonable design, simple structure, convenience and feasibility in operation and easiness in maintenance and can lower the friction force during the agitating process of the drilling bit and soil and improve the soil cutting capability, so as to guarantee the full contact and mixing of soil and additional fluid; and the double-fin type drilling bit can be used for treating soil contaminated by heavy metals or volatile organic matters.
Description
Technical field
The utility model relates to a kind of drill bit, especially a kind of double-vane chip drill bit that is used for the reparation of contaminated soil original position.
Background technology
Special drill bit is generally used for drilling well (as well, oil gas well, injector well, mining well, monitor well) or other similar operations (mixing as soil) of different purposes.
A kind of deep-mixed pile drill bit is disclosed in the patent No. is the Chinese patent of ZL200520032328.8, its drill bit structure comprises slurry outlet, blade, bit body etc., solved the easy blocking problem of slurries in the Deep Mixing Piles Construction, but it does not consider multi fluid injection and problem such as the mixing that stirs.A kind of mixing tooth row rock bit that use in petroleum gas and mining drilling well field that is used in being the Chinese patent of ZL02279144.2, the patent No. is disclosed, the application stratum of this form drill bit has obtained expansion can be used for dead-soft to hard multiple stratum, the rational deployment of many cutting teeths on its gear wheel, has higher rate of penetration, and abrasion resistance is strong, the advantage that application life is long, but the performance of injecting fluid when not having original position and evenly stir soil.In addition, also provide a kind of drill bit that is used for making holes in soil in the United States Patent (USP) of No.20100218999, this drill bit comes off in drilling process in order to prevent cutter.The limitation of this patented technology is to run into its cutter of weak soil layer such as mud, clay and lost efficacy easily.
The utility model content
At the weak point that exists in the above-mentioned technology, it is a kind of simple in structure that the utility model provides, improve the cutting soil capacity when can reduce the frictional force in drill bit and the soil whipping process, thereby guarantee soil and add fully contacting and the double-vane chip drill bit that is used for the reparation of soil original position of mixing of fluid.
For achieving the above object, the utility model provides a kind of double-vane chip drill bit that the contaminated soil original position is repaired that is used for, constitute by drill body, fin, fluid jet pipe and cutting part, described fin is arranged on the outside of described drill body, the quantity of described fin is two, described fin is identical with the quantity of described fluid jet pipe, two described fins are arranged on the lower end, middle part of described drill body, described fluid jet pipe is arranged on the bottom of described fin, and described cutting part is distributed in the bottom of described fin and described drill body.
Described fluid jet pipe is arranged on the center line of described fin bottom axis.
Be provided with drill body core pipe in the inside of described drill body, described drill body core pipe is connected with described fluid jet pipe, is provided with spline on the top of described drill body, and end face is provided with seal at the top of described drill body.
Be evenly distributed with a plurality of jets on described fluid jet pipe, described drill body core pipe and described fluid jet pipe and described jet form the FLUID TRANSPORTATION path.
Described drill body bottom be shaped as taper shape.
Described fin thickness is 5~10cm, and radius is 0.75~2.5m.
The diameter of described fluid jet pipe is 30~40mm, is provided with at least four described jets on described fluid jet pipe, and described jet along continuous straight runs is vertically set on the surface of described fluid jet pipe, and the diameter of described jet is 10~15mm.
Two described fins are parallel along axis horizontal.
Be provided with the described cutting part of two rows on the surface of described fin and described drill body bottom, the place of putting the first edge on a knife or a pair of scissors of described cutting part forms 30 ° downward-sloping angle with horizontal plane.
Compared with prior art, the utlity model has following advantage:
The double-vane chip drill bit that is used for the reparation of soil original position that the utility model provides, constitute by drill body, fin, fluid jet pipe and cutting part, fin is arranged on the outside of drill body, the quantity of fin is two, fin is identical with the quantity of fluid jet pipe, two fins are arranged on the lower end, middle part of drill body, and the fluid jet pipe is arranged on the center line of fin bottom axis, and cutting part is distributed in the bottom of fin and drill body.Be provided with drill body core pipe in the inside of drill body, drill body core pipe is connected with the fluid jet pipe, is evenly distributed with a plurality of jets on the fluid jet pipe, and drill body core pipe and fluid jet pipe and jet form the FLUID TRANSPORTATION path.The utlity model has feasible, the characteristics that are easy to safeguard reasonable in design, simple in structure, easy to operate, improve the cutting soil capacity when can reduce the frictional force in drill bit and the soil whipping process, thereby guarantee soil and add fully contacting and mixing of fluid, can be used for the improvement of heavy metal or volatile organic matter contaminated soil, as the special drill bit that soil stirs, can carry out original position soil mix+curing compound slurries, original position soil mix+pilot scale and The field such as hot air injection.The utility model has broad application prospects in contaminated soil original position reparation field.
Description of drawings
Fig. 1 structural representation of the present utility model.
The primary clustering symbol description is as follows:
1 drill body, 2 fins, 3 fluid jet pipes
4 cutting parts, 5 drill bodies bottom, 6 jets
7 splines, 8 seals, 9 drill body core pipes
10 FLUID TRANSPORTATION paths
The specific embodiment
For clearer statement the utility model, the utility model will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, the utility model provides a kind of double-vane chip drill bit that the soil original position is repaired that is used for, and is made of drill body 1, fin 2, fluid jet pipe 3 and cutting part 4, and fin is arranged on the outside of drill body.The thickness of fin is 5~10cm, and the radius of fin is 0.75~2.5m.Wherein, the quantity of fin 2 is two, fin 2 is identical with the quantity of fluid jet pipe 3, two fins 2 are set in parallel in the lower end, middle part of drill body 1 along axis horizontal, fluid jet pipe 3 is arranged on the center line of fin 2 bottom axis, and cutting part 4 is distributed in the bottom of fin 2 and drill body 1.Be provided with two row's cutting parts 4 at the inner surface of fin 2 and the outer surface of drill body bottom, the place of putting the first edge on a knife or a pair of scissors of this cutting part forms 30 ° downward-sloping angle with horizontal plane, this cutting part is the alloy bit, and the quantity of every row's alloy bit is 4~5.Wherein, be installed in two on fin row cutting part and be the main cutting tool in the slewing drilling machine drilling process, be installed in the row of two on drill bit bottom outer surface cutting part and be the secondary cutting element in the slewing drilling machine drilling process.Four row's alloy cutting parts and two fins be by creeping into the revolution operation that waits machinery, and finish the function of cutting and stirring soil.Drill body bottom 5 be shaped as taper shape.Be provided with drill body core pipe 9 in the inside of drill body 1, this drill body core pipe 9 is connected with two fluid jet pipes 3, be provided with spline 7 on the top of drill body 1, this spline is the top that the symmetrical expression form is arranged on drill body, is provided with seal 8 on the end face of the top of drill body 1.Be evenly distributed with a plurality of jets 6 on fluid jet pipe 3, drill body core pipe 9 forms the FLUID TRANSPORTATION path with fluid jet pipe 3 and jet 6, thereby realizes the extraneous fluid function of injecting of carrying fluid to the soil horizon hole.Wherein, fluid jet pipe diameter is 30~40mm, is provided with at least four jets on the fluid jet pipe, and the diameter of this jet is 10~15mm, and the jet along continuous straight runs is vertically set on the surface of fluid jet pipe.
The utility model by with device assembles such as professional rig, air compressor machine or pump group after constitute complete soil stirring-fluid injection system, can realize simultaneously that soil stirs and the function of injecting fluid, finish injection operations such as medicament or air efficiently, safely, fast, administer the purpose of contaminated soil to reach original position.The utility model is used for the application that soil original positions such as soil stirring+solidification and stabilization, the injection of soil stirring+hot air are repaired, by constituting the purpose that complete soil mixes injecting fluid in the process with equipment such as professional rig, air compressor machine, pump groups, it is repaired place type and is mainly heavy metal pollution or volatile organic contaminant contaminated site, and the rehabilitating soil type is in sand, silt, the silty clay etc., hypotonicity soil.
Advantage of the present utility model is as follows:
1, double fins of the present utility model, two-fluid playpipe, to arrange design such as cutting element simple relatively more, is applied to the reparation of contaminated soil original position, has economy, characteristics of high efficiency;
2, the utility model is suitable for the soil wide ranges, can be adapted to the scene of different geological conditionss, commonly all can adopt this form drill bit to carry out soil original position stirring+fluid (as hot air or chemical grout) injection reparation as edaphic conditions such as sand, silt, silty clay, argillic horizons; In addition, be applicable to that the pollutant kind of removal is very extensive, comprise heavy metal and volatile organic matter etc.;
3, the setting of the core pipe of bit body of the present utility model, conical lower section design feature, the connection of top keyway and seal has guaranteed that high-pressure fluid safety enters the soil aperture, has boring correcting function, increased the fastness that drill bit is connected with drilling tool;
4, double fins structure of the present utility model helps overcoming the frictional resistance in the soil whipping process; The setting of fluid jet pipe and jet thereof can be carried out in pore-forming-injecting fluid process at drilling machine, forms fluid jet tangent and the boring cylindrical, stirs effective radius thereby increased soil, can increase substantially single hole and repair area, shortens repairing efficiency.
More than disclosed only be several specific embodiment of the present utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into protection domain of the present utility model.
Claims (9)
1. one kind is used for the double-vane chip drill bit that the contaminated soil original position is repaired, constitute by drill body, fin, fluid jet pipe and cutting part, described fin is arranged on the outside of described drill body, it is characterized in that, the quantity of described fin is two, described fin is identical with the quantity of described fluid jet pipe, two described fins are arranged on the lower end, middle part of described drill body, described fluid jet pipe is arranged on the bottom of described fin, and described cutting part is distributed in the bottom of described fin and described drill body.
2. a kind of double-vane chip drill bit that the contaminated soil original position is repaired that is used for as claimed in claim 1 is characterized in that described fluid jet pipe is arranged on the center line of described fin bottom axis.
3. a kind of double-vane chip drill bit that the contaminated soil original position is repaired that is used for as claimed in claim 1, it is characterized in that, be provided with drill body core pipe in the inside of described drill body, described drill body core pipe is connected with described fluid jet pipe, top at described drill body is provided with spline, and end face is provided with seal at the top of described drill body.
4. a kind of double-vane chip drill bit that the contaminated soil original position is repaired that is used for as claimed in claim 3, it is characterized in that, be evenly distributed with a plurality of jets on described fluid jet pipe, described drill body core pipe and described fluid jet pipe and described jet form the FLUID TRANSPORTATION path.
5. a kind of double-vane chip drill bit that the contaminated soil original position is repaired that is used for as claimed in claim 1 is characterized in that, described drill body bottom be shaped as taper shape.
6. a kind of double-vane chip drill bit that the contaminated soil original position is repaired that is used for as claimed in claim 1 is characterized in that described fin thickness is 5~10cm, and radius is 0.75~2.5m.
7. a kind of double-vane chip drill bit that the contaminated soil original position is repaired that is used for as claimed in claim 4, it is characterized in that, the diameter of described fluid jet pipe is 30~40mm, on described fluid jet pipe, be provided with at least four described jets, described jet along continuous straight runs is vertically set on the surface of described fluid jet pipe, and the diameter of described jet is 10~15mm.
8. a kind of double-vane chip drill bit that the contaminated soil original position is repaired that is used for as claimed in claim 1 is characterized in that two described fins are parallel along axis horizontal.
9. a kind of double-vane chip drill bit that the contaminated soil original position is repaired that is used for as claimed in claim 1, it is characterized in that, be provided with the described cutting part of two rows on the surface of described fin and described drill body bottom, the place of putting the first edge on a knife or a pair of scissors of described cutting part forms 30 ° downward-sloping angle with horizontal plane.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011200581711U CN202090836U (en) | 2011-03-08 | 2011-03-08 | Double-fin type drilling bit used for in-situ remediation of contaminated soil |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011200581711U CN202090836U (en) | 2011-03-08 | 2011-03-08 | Double-fin type drilling bit used for in-situ remediation of contaminated soil |
Publications (1)
Publication Number | Publication Date |
---|---|
CN202090836U true CN202090836U (en) | 2011-12-28 |
Family
ID=45365909
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2011200581711U Expired - Lifetime CN202090836U (en) | 2011-03-08 | 2011-03-08 | Double-fin type drilling bit used for in-situ remediation of contaminated soil |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN202090836U (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104353666A (en) * | 2014-10-31 | 2015-02-18 | 上海岩土工程勘察设计研究院有限公司 | In-situ stirring curing and repairing method for heavy metal polluted soil |
CN104790449A (en) * | 2015-04-29 | 2015-07-22 | 河北新钻钻机有限公司 | Submersible type dredger |
CN105290098A (en) * | 2015-11-18 | 2016-02-03 | 北京建工环境修复股份有限公司 | Drill bit capable of achieving ignition and heating and soil restoration system |
CN105370210A (en) * | 2015-11-03 | 2016-03-02 | 北京建工环境修复股份有限公司 | Heating drill bit and method for removing organic pollutants |
CN106013157A (en) * | 2016-07-29 | 2016-10-12 | 长江勘测规划设计研究有限责任公司 | Coarse granular material dam gap jet stirring filling device |
CN106050157A (en) * | 2016-08-15 | 2016-10-26 | 南京市宜德思环境科技有限责任公司 | Drill pipe device for mixed injection of various medicaments |
CN107747480A (en) * | 2017-10-09 | 2018-03-02 | 中交隧道工程局有限公司 | A kind of jet reverse circulation system |
CN107747475A (en) * | 2017-10-09 | 2018-03-02 | 中交隧道工程局有限公司 | A kind of jet reverse circulation drill bit |
CN109137953A (en) * | 2018-09-07 | 2019-01-04 | 中交二航局第二工程有限公司 | Native construction equipment is quickly taken under water |
CN109174954A (en) * | 2018-08-07 | 2019-01-11 | 广西博世科环保科技股份有限公司 | Broken stirring dosing integration soil in-situ prosthetic appliance |
CN113020244A (en) * | 2021-03-16 | 2021-06-25 | 中国建筑第四工程局有限公司 | High-pressure rotary spraying device for in-situ remediation of contaminated soil and construction method |
CN113216854A (en) * | 2021-05-10 | 2021-08-06 | 河南理工大学 | Deep quicksand layer cutting auxiliary device and method for forming pile by using same |
CN115369863A (en) * | 2022-09-23 | 2022-11-22 | 同济大学 | In-situ soil and underground water remediation method adopting double-pipe double-channel liquid adding, powder spraying and stirring |
-
2011
- 2011-03-08 CN CN2011200581711U patent/CN202090836U/en not_active Expired - Lifetime
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104353666A (en) * | 2014-10-31 | 2015-02-18 | 上海岩土工程勘察设计研究院有限公司 | In-situ stirring curing and repairing method for heavy metal polluted soil |
CN104790449A (en) * | 2015-04-29 | 2015-07-22 | 河北新钻钻机有限公司 | Submersible type dredger |
CN105370210A (en) * | 2015-11-03 | 2016-03-02 | 北京建工环境修复股份有限公司 | Heating drill bit and method for removing organic pollutants |
CN105290098B (en) * | 2015-11-18 | 2018-01-05 | 北京建工环境修复股份有限公司 | One kind, which can light a fire, heats drill bit and a kind of soil repair system |
CN105290098A (en) * | 2015-11-18 | 2016-02-03 | 北京建工环境修复股份有限公司 | Drill bit capable of achieving ignition and heating and soil restoration system |
CN106013157A (en) * | 2016-07-29 | 2016-10-12 | 长江勘测规划设计研究有限责任公司 | Coarse granular material dam gap jet stirring filling device |
CN106013157B (en) * | 2016-07-29 | 2018-06-19 | 长江勘测规划设计研究有限责任公司 | A kind of device in jet mixing filling Coarse Aggregate dam body gap |
CN106050157A (en) * | 2016-08-15 | 2016-10-26 | 南京市宜德思环境科技有限责任公司 | Drill pipe device for mixed injection of various medicaments |
CN107747480A (en) * | 2017-10-09 | 2018-03-02 | 中交隧道工程局有限公司 | A kind of jet reverse circulation system |
CN107747475A (en) * | 2017-10-09 | 2018-03-02 | 中交隧道工程局有限公司 | A kind of jet reverse circulation drill bit |
CN109174954A (en) * | 2018-08-07 | 2019-01-11 | 广西博世科环保科技股份有限公司 | Broken stirring dosing integration soil in-situ prosthetic appliance |
CN109137953A (en) * | 2018-09-07 | 2019-01-04 | 中交二航局第二工程有限公司 | Native construction equipment is quickly taken under water |
CN113020244A (en) * | 2021-03-16 | 2021-06-25 | 中国建筑第四工程局有限公司 | High-pressure rotary spraying device for in-situ remediation of contaminated soil and construction method |
CN113216854A (en) * | 2021-05-10 | 2021-08-06 | 河南理工大学 | Deep quicksand layer cutting auxiliary device and method for forming pile by using same |
CN115369863A (en) * | 2022-09-23 | 2022-11-22 | 同济大学 | In-situ soil and underground water remediation method adopting double-pipe double-channel liquid adding, powder spraying and stirring |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN202090836U (en) | Double-fin type drilling bit used for in-situ remediation of contaminated soil | |
CN104763343B (en) | A kind of multistage borehole-enlarging drilling tool and its expanding method of the bionical nozzle of build-in | |
CN102003140B (en) | Traversing reverse circulating drilling method of horizontal directional drilling pipeline and special drilling bit | |
CN109322699B (en) | Pollution isolation and plugging technology under mine | |
CN102678049B (en) | Circular cutting drill bit, rotary drilling machine and rock drilling method adopting static blasting | |
US10794136B2 (en) | Reverse rotary sprinkler drilling pipe system with anti-sticking function and its application method | |
CN104295239A (en) | Method for using rotary drilling rig to drill into hard rock stratum | |
CN201395793Y (en) | Long spiral high-pressure spraying mud injecting stirring pile-forming device | |
CN110424896A (en) | A kind of hole stake drilling construction method and device suitable for high backfill Karst Geological Landscape | |
CN104763348A (en) | Embedded bionic nozzle type drilling and expanding integral drilling tool and drilling and hole expandin method thereof | |
CN201746831U (en) | Turbopump-lifting downhole and rotary drilling machine | |
CN106761448A (en) | A kind of pile-driving machine | |
CN105937238A (en) | Stirring drilling machine | |
CN204476294U (en) | The brill of the bionical nozzle of a kind of build-in expands integral type drilling tool | |
CN105178858A (en) | Drilling rig for double-tube high pressure jet grouting technology | |
CN104763338A (en) | Hole expanding device, pull-back hole expanding assembly and hole expanding drilling method thereof | |
CN204476279U (en) | The multistage borehole-enlarging drilling tool of the bionical nozzle of a kind of build-in | |
CN103147687B (en) | Ring-type cutting method for excavating rocks at bottom part of pit shaft of bored pile | |
CN203948030U (en) | The quick-changing type single-cone rotary drill bit of rotary drilling rig core drill bit special use | |
CN204476270U (en) | A kind of reamer and reaming assembly of pulling back | |
CN211448510U (en) | Reverse circulation drilling device | |
CN104314121B (en) | Pore forming machine with symmetrical rotating wheels for geotechnical engineering | |
CN205400596U (en) | Cubic metre of earth and stone bores and digs device | |
CN201686982U (en) | Aperture guard device | |
CN203866849U (en) | Seamless junction underground diaphragm wall guide wall structure on complex stratum |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C56 | Change in the name or address of the patentee |
Owner name: BCEG ENVIRONMENTAL REMEDIATION CO., LTD. Free format text: FORMER NAME: BCEG ENVIRONMENT REMEDIATION CO., LTD. |
|
CP03 | Change of name, title or address |
Address after: 100192 No. 9, No. 102, building 2, 202 Qing Lu, Chaoyang District, Beijing Patentee after: BCEG ENVIRONMENTAL REMEDIATION CO., LTD. Address before: 100192, Beijing Chaoyang District No. 2 Qing Street, No. 9 Building (South), 2 floor Patentee before: BCEG Environment Remediation Co., Ltd. |
|
CX01 | Expiry of patent term | ||
CX01 | Expiry of patent term |
Granted publication date: 20111228 |