CN111653222A - High altitude bill-board is with preventing strong wind system certainly - Google Patents
High altitude bill-board is with preventing strong wind system certainly Download PDFInfo
- Publication number
- CN111653222A CN111653222A CN202010686145.7A CN202010686145A CN111653222A CN 111653222 A CN111653222 A CN 111653222A CN 202010686145 A CN202010686145 A CN 202010686145A CN 111653222 A CN111653222 A CN 111653222A
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- wall
- sliding plug
- board
- strong wind
- fixed plate
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F15/00—Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like
- G09F15/0087—Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like including movable parts, e.g. movable by the wind
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D5/00—Other wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/30—Wind motors specially adapted for installation in particular locations
- F03D9/34—Wind motors specially adapted for installation in particular locations on stationary objects or on stationary man-made structures
- F03D9/43—Wind motors specially adapted for installation in particular locations on stationary objects or on stationary man-made structures using infrastructure primarily used for other purposes, e.g. masts for overhead railway power lines
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F7/00—Signs, name or number plates, letters, numerals, or symbols; Panels or boards
- G09F7/18—Means for attaching signs, plates, panels, or boards to a supporting structure
- G09F7/22—Means for attaching signs, plates, panels, or boards to a supporting structure for rotatably or swingably mounting, e.g. for boards adapted to be rotated by the wind
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/30—Wind power
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
The invention discloses a self-strong wind prevention system for a high-altitude advertising board, which comprises a fixed plate, wherein a groove is formed in the side wall of the fixed plate, the inner wall of the groove is rotatably connected with a plurality of display plates through a rotating shaft, the display plates form a shutter type structure, a sliding plug cavity is formed in the side wall of the fixed plate, the inner wall of the sliding plug cavity is hermetically and slidably connected with a sliding plug, the upper end of the sliding plug is fixedly connected with a vertical rod, the upper end of the vertical rod penetrates through the upper end of the fixed plate and is fixedly connected with a wing-shaped plate, and the top in the sliding. According to the invention, the wing-shaped plate is driven by outdoor strong wind to slide upwards, so that the pressing plate extrudes the piezoelectric rings, current is generated on the piezoelectric rings, further magnetism is generated on the electromagnet, and further the permanent magnets drive the display plate to rotate outwards under the action of the magnetic repulsion force of the electromagnet, so that strong wind flows out from the gap between the display plates, the advertising board is prevented from being damaged under the action of strong wind, and the maintenance cost of the advertising board is reduced.
Description
Technical Field
The invention relates to the technical field of billboards, in particular to a self-defense strong wind system for a high-altitude billboard.
Background
With the development of the times, enterprises often set some high-altitude advertising boards for better displaying product information of the enterprises, so that the product information is displayed to people all the day.
Present high altitude bill-board is all with product information snap-on the fixed plate, make the bill-board form a great plane of accomplishing, when high altitude bill-board meets strong wind, strong wind will carry out great impact to the bill-board, make the bill-board damage very easily, and the bill-board that damages drops and can bring the injury to pedestrian on the road, cause the emergence of incident, in addition, for more extensive show product information, some high altitude bill-boards are often set up in the open air, can not be timely after the bill-board is destroyed handle it, and then influence the propagation of information.
Therefore, we propose a self-defense strong wind system for high-altitude advertising board.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a self-defense strong wind system for a high-altitude advertising board.
In order to achieve the purpose, the invention adopts the following technical scheme:
a self-protection strong wind system for high-altitude advertising boards comprises a fixed plate, wherein the side wall of the fixed plate is provided with a groove, the inner wall of the groove is rotationally connected with a plurality of display boards through a rotating shaft, the display boards form a shutter type structure, a sliding plug cavity is arranged on the side wall of the fixed plate, the inner wall of the sliding plug cavity is connected with a sliding plug in a sealing and sliding way, the upper end of the sliding plug is fixedly connected with a vertical rod, the upper end of the vertical rod penetrates through the upper end of the fixing plate and is fixedly connected with an airfoil plate, the top in the sliding plug cavity is fixedly connected with a piezoelectric ring which is made of piezoelectric ceramic material, the side wall of the vertical rod is sleeved with a telescopic spring, the upper end of the telescopic spring is fixedly connected with a pressing plate, permanent magnets are embedded in the display plate, the display board is characterized in that a plurality of electromagnets repellent with the permanent magnets are embedded in the groove, and the side wall of the display board is fixedly connected with the inner wall of the groove through a return spring.
Preferably, the side wall of the fixing plate is provided with a through groove, and the inner wall of the groove is provided with a plurality of air outlets communicated with the through groove.
Preferably, the side wall of the fixing plate is provided with an annular cavity, the side wall of the annular cavity is provided with a plurality of air injection holes communicated with the inner wall of the groove, the bottom of the cavity of the sliding plug is connected with the inner wall of the annular cavity through a one-way air outlet pipe, and a one-way air suction pipe is connected below the inner wall of the sliding plug cavity.
The invention has the following beneficial effects:
1. by arranging the wing-shaped plate, the pressing plate and the piezoelectric rings, when wind blows outdoors, because the upper end of the wing-shaped plate is arranged in an arch surface manner, the Bernoulli principle shows that the gas flow rate at the upper end of the wing-shaped plate is greater than that at the lower end, and then the gas pressure at the upper end is less than that at the lower end, so that the wing-shaped plate slides upwards under the action of pressure intensity, the pressing plate extrudes the piezoelectric rings, current is generated on the piezoelectric rings, the kinetic energy of the wind is effectively converted into electric energy, and the wind-driven generator;
2. when current is generated on the piezoelectric ring, the electromagnet is electrified to generate magnetism, and then the permanent magnets drive the display board to rotate outwards under the action of the magnetic repulsion force of the electromagnet, so that strong wind passes through the gap between the display boards and flows out of the through groove, the advertising board is prevented from being damaged under the action of the strong wind, the maintenance cost of the advertising board is reduced, and the effective display time of information is prolonged;
3. when the outdoor wind power is weak, the ascending height of the wing-shaped plate is small, so that the extrusion degree of the pressing plate on the piezoelectric ring is small, the current generated on the piezoelectric ring is small, the repulsion force of the electromagnet on the permanent magnet is small, the elasticity of the reset spring cannot be overcome, the display board is kept horizontal, and the normal display of the information on the display board is not influenced;
4. through setting up the annular chamber, the fumarole, one-way outlet duct and one-way breathing pipe, when the aerofoil board rose, smooth stopper intracavity space increase, pressure reduces, make smooth stopper chamber breathe in through one-way breathing pipe, when wind-force is less, the stopper gliding under the action of gravity of smooth stopper and aerofoil board, extrude the gas in the smooth stopper intracavity to the annular chamber through one-way outlet duct, and from the blowout of fumarole, clear up the dust on the show board, avoid the dust on the show board to shelter from information.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is an enlarged view of the structure at A in FIG. 1;
FIG. 3 is a schematic structural diagram of a second embodiment of the present invention;
fig. 4 is an enlarged schematic view of the structure at B in fig. 3.
In the figure: the device comprises a fixing plate 1, a groove 2, a display plate 3, a sliding plug cavity 4, a sliding plug 5, a vertical rod 6, an aerofoil plate 7, a piezoelectric ring 8, a telescopic spring 9, a pressing plate 10, a permanent magnet 11, an electromagnet 12, a return spring 13, a through groove 14, an air outlet 15, an annular cavity 16, an air vent 17, a one-way air outlet pipe 18 and a one-way air suction pipe 19.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Example one
Referring to fig. 1-2, a self-protection strong wind system for high-altitude advertising boards comprises a fixing plate 1, a groove 2 is formed in the side wall of the fixing plate 1, a plurality of display boards 3 are rotatably connected to the inner wall of the groove 2 through a rotating shaft, the plurality of display boards 3 form a louver structure, a sliding plug cavity 4 is formed in the side wall of the fixing plate 1, a sliding plug 5 is connected to the inner wall of the sliding plug cavity 4 in a sealing and sliding manner, further, through holes communicated with the outside are symmetrically formed in the inner wall of the sliding plug cavity 4 to balance the pressure generated when the sliding plug 5 slides up and down in the sliding plug cavity 4, a vertical rod 6 is fixedly connected to the upper end of the sliding plug 5, the upper end of the vertical rod 6 penetrates through the upper end of the fixing plate 1 and is fixedly connected with a wing-shaped plate 7, it is noted that the upper end of the wing-shaped plate 7 is arranged in an arched manner, when wind blows over, and then the atmospheric pressure of its upper end is less than the atmospheric pressure of lower extreme for the aerofoil board 7 upwards slides under the effect of pressure, top fixedly connected with piezoelectric ring 8 in sliding plug chamber 4, piezoelectric ring 8 adopts piezoceramics material to make, it should be said that piezoelectric ceramic is the information function ceramic material that can convert mechanical energy and electric energy each other, receive the extrusion to produce when deformation promptly on piezoelectric ceramic, its inside can produce the electric current, montant 6 lateral wall cover is equipped with expanding spring 9, expanding spring 9 upper end fixedly connected with clamp plate 10, show board 3 embeds is equipped with permanent magnetism piece 11, recess 2 embeds is equipped with a plurality of electro-magnets 12 that repel each other with permanent magnetism piece 11, show board 3 lateral wall passes through reset spring 13 and recess 2 inner wall fixed connection.
It should be noted that, when the outdoor wind is small and will not harm the display board 3, the pressure difference received by the airfoil board 7 is small, and then the distance of upward movement of the airfoil board 7 is small, under the action of the extension spring 9, the extrusion force of the pressing plate 10 to the piezoelectric ring 8 is small, so that the current generated by the piezoelectric ring 8 is small, and further the repulsion force of the electromagnet 12 to the permanent magnet 11 is small, and the elasticity of the reset spring 13 cannot be overcome, so that the display board 3 is kept horizontal, and the normal display of the information on the display board 3 is not affected, when strong wind is generated outdoors, the pressure difference received by the airfoil board 7 is large, and further the distance of upward movement of the airfoil board 7 is large, under the action of the extension spring 9, the extrusion force of the pressing plate 10 to the piezoelectric ring 8 is large, so that the current generated by the piezoelectric ring 8 is large, and further the repulsion force of the electromagnet 12 to the permanent magnet 11 is increased, so that the plurality of display boards 3 are in a shutter type structure, and the wind flows out from the gaps among the display boards 3.
The lateral wall of the fixing plate 1 is provided with a through groove 14, and the inner wall of the groove 2 is provided with a plurality of air outlets 15 communicated with the through groove 14.
In this embodiment, when strong wind is generated outdoors, because the upper end of the airfoil plate 7 is arranged in an arched shape, when the strong wind blows over the airfoil plate 7, as known from bernoulli's principle, the gas flow rate at the upper end of the airfoil plate 7 is greater than the gas flow rate at the lower end, and then the gas pressure at the upper end is less than the gas pressure at the lower end, so that the airfoil plate 7 slides upwards under the action of pressure, and further drives the sliding plug 5 to slide upwards on the inner wall of the sliding plug cavity 4, so that the pressing plate 10 extrudes the piezoelectric ring 8, and further the piezoelectric ring 8 is deformed and generates induced current, so that the electromagnet 12 is energized to generate magnetism, and as the airfoil plate 7 slides upwards, under the action of the extension spring 9, the larger the pressing plate 10 extrudes the piezoelectric ring 8, and further the larger the current generated on the piezoelectric ring 8, and further the magnetism on the electromagnet 12 is increased, and the magnetic repulsion force between, and then permanent magnetism piece 11 drives show board 3 outwards rotation under the effect of magnetic repulsion for strong wind carries out logical groove 14 outflow through air outlet 15 from the gap between a plurality of show boards 3, reduces the impact of strong wind to show board 3, reduces the damage of show board 3.
Example two
Referring to fig. 3-4, the difference with the first embodiment is that an annular chamber 16 has been seted up to fixed plate 1 lateral wall, annular chamber 16 lateral wall has seted up a plurality of fumaroles 17 with recess 2 inner wall intercommunication, it is further, a plurality of fumaroles 17 set up towards show board 3 lateral wall slope, make the tangential force to show board 3 lateral wall great when gas is followed fumarole 17 and is located high-speed blowout, and then can be better clear up the stubborn impurity of show board 3 lateral wall, the bottom passes through one- way outlet duct 18 and 16 inner wall connections of annular chamber in the sliding plug chamber 4, sliding plug chamber 4 inner wall below is connected with one-way breathing pipe 19, it needs to explain, one-way outlet duct 18 only allows gas to get into annular chamber 16 from sliding plug chamber 4 in, one-way breathing pipe 19 only allows gas to get into sliding plug chamber 4 from.
In this embodiment, when strong wind rises outdoors to drive airfoil plate 7 to rise, sliding plug 5 slides on the inner wall of sliding plug cavity 4 this moment, and then the increase of the space in sliding plug cavity 4, pressure intensity is reduced, make sliding plug cavity 4 breathe in through one-way breathing pipe 19, when wind-force is less, make sliding plug 5 slide in sliding plug cavity 4 inner wall under the action of gravity of sliding plug 5 and airfoil plate 7, and then the space in sliding plug cavity 4 reduces, pressure intensity increases, extrude the gas in sliding plug cavity 4 to annular cavity 16 in through one-way outlet duct 18, and spout from fumarole 17, clear up the dust on show board 3, avoid the dust on show board 3 to shelter from information, influence the normal show of information.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (3)
1. The utility model provides a high altitude bill-board is with preventing strong wind system certainly, includes fixed plate (1), its characterized in that, fixed plate (1) lateral wall has seted up recess (2), recess (2) inner wall rotates through the pivot to be connected with a plurality of show boards (3), and is a plurality of show board (3) constitution venetian blind formula structure, sliding plug chamber (4) has been seted up to fixed plate (1) lateral wall, sliding plug chamber (4) inner wall sealing sliding connection has sliding plug (5), sliding plug (5) upper end fixedly connected with montant (6), montant (6) upper end runs through fixed plate (1) upper end and fixedly connected with airfoil board (7), top fixedly connected with piezoelectric ring (8) in sliding plug chamber (4), piezoelectric ring (8) adopt piezoceramics material to make, montant (6) lateral wall cover is equipped with expanding spring (9), expanding spring (9) upper end fixedly connected with clamp plate (10), show board (3) embedded permanent magnetism piece (11) that is equipped with, recess (2) embedded be equipped with a plurality of with permanent magnetism piece (11) repellent's electro-magnet (12), show board (3) lateral wall passes through reset spring (13) and recess (2) inner wall fixed connection.
2. The self-defense strong wind system for the high-altitude advertising board as claimed in claim 1, wherein the side wall of the fixing plate (1) is provided with a through groove (14), and the inner wall of the groove (2) is provided with a plurality of wind outlets (15) communicated with the through groove (14).
3. The self-defense strong wind system for the high-altitude advertising board according to claim 1, wherein the side wall of the fixing plate (1) is provided with an annular cavity (16), the side wall of the annular cavity (16) is provided with a plurality of air injection holes (17) communicated with the inner wall of the groove (2), the bottom in the sliding plug cavity (4) is connected with the inner wall of the annular cavity (16) through a one-way air outlet pipe (18), and a one-way air suction pipe (19) is connected below the inner wall of the sliding plug cavity (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010686145.7A CN111653222A (en) | 2020-07-16 | 2020-07-16 | High altitude bill-board is with preventing strong wind system certainly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010686145.7A CN111653222A (en) | 2020-07-16 | 2020-07-16 | High altitude bill-board is with preventing strong wind system certainly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111653222A true CN111653222A (en) | 2020-09-11 |
Family
ID=72343065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010686145.7A Withdrawn CN111653222A (en) | 2020-07-16 | 2020-07-16 | High altitude bill-board is with preventing strong wind system certainly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111653222A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112547731A (en) * | 2020-11-24 | 2021-03-26 | 古格亚(温州)网络科技有限公司 | Auxiliary assembly for automatically cleaning precipitated cement and improving conveying efficiency for cement transportation |
| CN112927634A (en) * | 2021-01-14 | 2021-06-08 | 宁波伟捷信息科技有限公司 | Sponge city is with wind energy electricity generation bill-board |
-
2020
- 2020-07-16 CN CN202010686145.7A patent/CN111653222A/en not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| 侯育冬: "《电子陶瓷化学法构建与物性分析》", 31 August 2018, 冶金工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112547731A (en) * | 2020-11-24 | 2021-03-26 | 古格亚(温州)网络科技有限公司 | Auxiliary assembly for automatically cleaning precipitated cement and improving conveying efficiency for cement transportation |
| CN112927634A (en) * | 2021-01-14 | 2021-06-08 | 宁波伟捷信息科技有限公司 | Sponge city is with wind energy electricity generation bill-board |
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Application publication date: 20200911 |
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