CN108812626B - Bird repelling and bird nesting preventing device - Google Patents
Bird repelling and bird nesting preventing device Download PDFInfo
- Publication number
- CN108812626B CN108812626B CN201810421303.9A CN201810421303A CN108812626B CN 108812626 B CN108812626 B CN 108812626B CN 201810421303 A CN201810421303 A CN 201810421303A CN 108812626 B CN108812626 B CN 108812626B
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- connecting rods
- hinged
- telescopic
- bird
- connecting plate
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- 230000001846 repelling effect Effects 0.000 title claims abstract description 23
- 230000001681 protective effect Effects 0.000 claims description 22
- 230000008602 contraction Effects 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 230000005484 gravity Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/06—Scaring or repelling devices, e.g. bird-scaring apparatus using visual means, e.g. scarecrows, moving elements, specific shapes, patterns or the like
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/30—Scaring or repelling devices, e.g. bird-scaring apparatus preventing or obstructing access or passage, e.g. by means of barriers, spikes, cords, obstacles or sprinkled water
- A01M29/32—Scaring or repelling devices, e.g. bird-scaring apparatus preventing or obstructing access or passage, e.g. by means of barriers, spikes, cords, obstacles or sprinkled water specially adapted for birds, e.g. spikes
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Birds (AREA)
- Engineering & Computer Science (AREA)
- Insects & Arthropods (AREA)
- Pest Control & Pesticides (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Catching Or Destruction (AREA)
Abstract
The invention discloses a bird-expelling and bird-nesting preventing device, which comprises a bird-expelling component fixedly connected with a cross arm by a locking component, wherein the bird-expelling component comprises a telescopic ball with telescopic freedom degree formed by a group of movable components hinged with each other, an upper connecting plate in the movable components is hinged with a group of first connecting rods, a lower connecting plate is hinged with a group of second connecting rods, the first connecting rods and the second connecting rods are arranged in a crossed manner, the crossed points are hinged nodes, the first connecting rods in adjacent movable components are hinged with each other, the second hinged shafts of the two mutually hinged second connecting rods stretch across the upper parts of the first hinged shafts of the two mutually hinged first connecting rods, the distance between the fixed points of the adjacent stretching ball in a stretching state and the stretching rope on the stretching ball in a shrinking state is equal to the stretching rope, the absorption length of the stretching ball, the bird repelling effect can be realized without wind power.
Description
Technical Field
The invention belongs to the technical field of electric auxiliary equipment, relates to a bird repeller, and particularly relates to a bird repeller and a bird nesting prevention device.
Background
With the enhancement of environmental awareness and the continuous improvement of ecological environment, the population, the number and the activity range of birds living in nature are gradually increased. Because most overhead transmission lines run in the field and are greatly influenced by bird activities, accidents such as short circuit, tripping and the like caused by bird nesting and inhabitation on a tower tend to rise year by year according to statistics of relevant departments of national power grids. The frequent occurrence of bird accidents not only causes great loss of manpower and material resources to operation and maintenance units, but also seriously threatens the safe operation of the power grid. Aiming at the phenomenon, a plurality of bird repellers are provided in the market, most of the bird repellers are wind driven, and the birds are rotated by taking wind power as a power source, so that the birds are abandoned to stay on high-voltage telegraph poles and electric wire towers due to surprise, and the aim of repelling the birds is achieved.
Disclosure of Invention
In order to solve the technical problems, the invention designs the bird repelling and bird nesting preventing device which is not influenced by wind power, improves the bird repelling effect and effectively prevents the harmful influence of birds on the safe operation of a power grid.
The invention adopts the technical scheme that the bird repelling and bird nesting preventing device comprises a bird repelling component fixedly connected with a cross arm by a locking component, and is characterized in that the bird repelling component comprises a telescopic ball with telescopic freedom degree formed by a group of mutually hinged movable components, the movable components comprise an upper connecting plate, a lower connecting plate, a first connecting rod and a second connecting rod, the upper connecting plate is respectively hinged with four first connecting rods, the lower connecting plate is respectively hinged with four second connecting rods, the first connecting rod and the second connecting rod are arranged in a crossed manner, the cross point of the first connecting rod and the second connecting rod is a hinged node, the first connecting rods in adjacent movable components are mutually hinged, the second hinged shafts of the two mutually hinged second connecting rods stretch over the first hinged shafts of the two mutually hinged first connecting rods, and the fixing points A of pull ropes are respectively arranged on the two adjacent telescopic balls, The telescopic ball is characterized by comprising a fixing point B, the length of the pull rope is L, the distance between the fixing point A and the fixing point B on two adjacent telescopic balls in the stretching state is S, the distance between the fixing point A and the fixing point B on the adjacent telescopic balls in the stretching state and the adjacent telescopic balls in the contraction state is L, wherein L is larger than S, an upper connecting plate at the lowest point in the telescopic balls is fixedly connected with the cross arm through a locking assembly, a protective rod with a thorn-shaped end and coated with a reflective layer is arranged on the periphery of the telescopic balls, the protective rod is higher than the circle center of the telescopic balls in the stretching state, the distance between the adjacent protective rods is smaller than the diameter of the telescopic balls in the contraction state, a ball-shaped wind whistle is arranged on the rod body of the protective rod, and the position at the lowest point in the telescopic balls is fixedly connected with the cross arm through the locking assembly.
The telescopic ball also comprises bird repelling thorns vertically arranged on the upper connecting plate.
The first connecting rods and the second connecting rods are arranged in a circumferential array along the upper connecting plate and the lower connecting plate respectively.
The locking assembly comprises an Contraband type fixing frame and a bolt arranged on the Contraband type fixing frame, an upper connecting plate at the lowest point in the telescopic ball is fixedly connected with the Contraband type fixing frame, and the Contraband type fixing frame is arranged on the periphery of the cross arm and is locked and fixed by the bolt.
The invention has the beneficial effects that: the movable component is hinged with the adjacent first connecting rod by virtue of the first connecting rod, the adjacent second connecting rod by virtue of the second connecting rod and the adjacent second connecting rod, the first connecting rod and the adjacent second connecting rod are mutually driven to contract by light touch and extend by light pull, when the telescopic balls are arranged on the cross arm, birds fall on one of the telescopic balls, the telescopic balls contract by virtue of the gravity of the birds, the contraction process has the effect of frightening and expelling the birds, at the moment, the pull ropes between the telescopic balls and the adjacent telescopic balls are in a tensioning state, when the birds fall on the telescopic balls adjacent to the telescopic balls, the adjacent telescopic balls contract, the pull ropes generate pulling force on the telescopic balls contracted before to extend the telescopic balls while frightening the birds, the pull ropes are laid, the automatic bird repelling effect of the bird nesting prevention device is realized by virtue of the gravity of the birds, the bird repelling effect is good, and the bird nesting prevention device does not need to operate by virtue of wind power, the influence of the natural environment is small; in addition, when a telescopic ball is in a contraction state, the surface of the telescopic ball is in a needle-punching shape, so that birds cannot stand on the telescopic ball in the contraction state to realize the bird repelling effect.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of a telescopic ball in a contracted state.
Fig. 3 is a side view of fig. 1.
Fig. 4 is a schematic view of the expansion ball in an expanded state.
Fig. 5 is a schematic view showing a contracted state of the telescopic ball.
Fig. 6 is a schematic structural view of the movable assembly.
In the drawing, 1 represents an upper connecting plate, 2 represents a lower connecting plate, 3 represents a telescopic ball, 4 represents a pull rope, 5 represents a first connecting rod, 6 represents a second connecting rod, 7 represents a first hinged shaft, 8 represents a second hinged shaft, 9 represents a cross arm, 10 represents a bird repelling thorn, 11 represents an Contraband-type fixing frame, 12 represents a bolt, 13 represents a fixing point A, 14 represents a fixing point B, 15 represents a guard bar, and 16 represents a ball-type wind whistle.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
The invention relates to a bird-repelling and bird-nesting preventing device, which comprises a bird-repelling component fixedly connected with a cross arm 9 by a locking component, and is characterized in that the bird-repelling component comprises a telescopic ball 3 with telescopic freedom degree formed by a group of mutually hinged movable components, the movable components comprise an upper connecting plate 1, a lower connecting plate 2, first connecting rods 5 and second connecting rods 6, the upper connecting plate 1 is respectively hinged with the four first connecting rods 5, the lower connecting plate 2 is respectively hinged with the four second connecting rods 6, the first connecting rods 5 and the second connecting rods 6 are arranged in a crossed manner, the cross points of the first connecting rods 5 and the second connecting rods 6 are hinged nodes, the first connecting rods 5 in adjacent movable components are mutually hinged, the second connecting rods 6 in adjacent movable components are mutually hinged, and the second hinged shafts 8 of the two mutually hinged second connecting rods 6 are crossed above the first hinged shafts 7 of the two mutually hinged first connecting rods 5, the two adjacent telescopic balls 3 are respectively provided with a fixed point A13 and a fixed point B14 of a pull rope 4, the length of the pull rope 4 is L, wherein the distance between the fixed point A13 and the fixed point B14 on the two adjacent telescopic balls 3 in an extension state is S, the distance between the fixed point A13 and the fixed point B14 on the adjacent telescopic balls 3 in an extension state and the telescopic balls 3 in a contraction state is L, wherein L is more than S, the upper connecting plate 1 at the lowest point in the telescopic balls 3 is fixedly connected with the cross arm 9 through a locking assembly, the upper connecting plate 1 is positioned at the outer ring of the telescopic balls 3, the lower connecting plate 2 is positioned at the inner ring of the telescopic balls 3, the telescopic balls 3 have the characteristic of easy stretching and shrinking through the special structure of a movable assembly, and the upper connecting plate 1, the first connecting rod 5, the lower connecting plate 2 and the second connecting rod 6 can shrink towards the sphere center by slightly pressurizing the local parts of the telescopic balls; when a slight pulling force is applied to the local part of the telescopic ball 3 in the contracted state, the upper connecting plate 1, the first connecting rod 5, the lower connecting plate 2 and the second connecting rod 6 can be extended outwards, and two adjacent telescopic balls 3 are in the extended state, the fixed point A13 on one telescopic ball 3 and the pull rope 4 fixedly connected with the fixed point B14 on the adjacent telescopic ball 3 are in a relaxed state, and when one telescopic ball 3 is stressed by external pressure, the telescopic ball contracts, at the moment, the distance between the fixed point A13 and the fixed point B14 is equal to the length L of the pull rope 4, and the pull rope 4 is in a tensioned state. Because flexible ball 3 has the characteristic of easy stretching and easy contracting, when birds fell on first flexible ball 3, first flexible ball 3 shrink then produces the frightening to birds, the expulsion, stay cord 4 tensioning between first flexible ball 3 and the adjacent flexible ball 3 this moment, birds when falling on adjacent flexible ball 3, because adjacent flexible ball 3 shrink, then stay cord 4 exerts the pulling force to first flexible ball 3, first flexible ball 3 then opens, this process has the effect of expulsion equally to birds, because the special setting of stay cord 4 length, when flexible ball 3 shrink, must can open adjacent flexible ball 3 that have already shrunk, this plays and lodges, can produce the frightening expulsion to birds in succession, and need not to realize the effect of driving the bird with the help of wind, still can drive bird work when few wind or no wind, effectively prevent birds from nesting.
The periphery of the telescopic ball 3 is provided with a protective rod 15 of which the end part is thorn-shaped and is coated with a reflective layer, the protective rod 15 is higher than the circle center of the telescopic ball 3 in an extension state, the distance between the adjacent protective rods 15 is smaller than the diameter of the telescopic ball 3 in a contraction state, a spherical wind whistle 16 is arranged on the rod body of the protective rod 15, the upper connecting plate 1 at the lowest point in the telescopic ball 3 is fixedly connected with the cross arm 9 by virtue of a locking component, the protective rod 15 effectively reduces the shaking of the telescopic ball 3 under the condition of strong wind, the telescopic ball 3 is prevented from being blown down and damaged, when the sunlight is sufficient, the light irradiates on the protective rod 15, the reflective layer on the protective rod 15 reflects the illumination, birds cannot be directly watched to be close to the reflective layer, under the windy condition, no matter which direction the wind blows, the circular arc surface of the spherical wind whistle 16 can be led into the spherical wind whistle 16 to generate whistle sound, and the function of expelling the birds can be generated, the illumination, the sound and the extension and contraction of the telescopic ball 3 are combined, so that the bird repelling effect is further enhanced.
Preferably, flexible ball 3 still including set up the bird thorn 10 that drives on the upper junction plate 1 perpendicularly, when flexible ball 3 extends, the interval is big between two adjacent upper junction plates 1, birds can fall into between the adjacent upper junction plate 1, birds exert pressure to flexible ball 3, flexible ball 3 shrink back, the interval diminishes between two adjacent upper junction plates 1, it becomes dense to drive bird thorn 10, birds can't fall on the flexible ball 3 that has contracted, can only flee from or select to fall on the flexible ball 3 under other extension states, and then make one stretch out and draw back between the flexible ball 3, prevent that birds from nesting.
Preferably, the upper connecting plate 1 is articulated with four first connecting rods 5 respectively, the lower connecting plate 2 articulated with four second connecting rods 6 respectively, first connecting rods 5, second connecting rods 6 are arranged along the circumference array of upper connecting plate 1, lower connecting plate 2 respectively, and upper connecting plate 1, 2 intensity of lower connecting plate are good, and articulated node is many, more help the holistic extension of flexible ball 3, shrink.
Preferably, the locking assembly comprises an Contraband-type fixing frame 11 and a bolt 12 arranged on the Contraband-type fixing frame 11, the upper connecting plate 1 and the guard bar 15 which are positioned at the lowest point in the telescopic ball 3 are fixedly connected with the Contraband-type fixing frame 11 respectively, the Contraband-type fixing frame 11 is arranged on the periphery of the cross arm 9 and is locked and fixed by the bolt 12, the Contraband-type fixing frame 11 is clamped and sleeved on the cross arm 9 during installation, the bolt 12 is screwed, the cross arm 9 and the Contraband-type fixing frame 11 are locked by the bolt 12, namely, the bird repelling assembly and the cross arm 9 are fixed, the structure is simple, and the operation is convenient.
An Contraband type fixing frame 11 fixedly connected with a plurality of telescopic balls 3 is placed on a cross arm 9 by means of a bird preventer mounting rod, a bolt 12 is screwed to move upwards to lock and fix the Contraband type fixing frame 11 and the cross arm 9, once birds fall on one telescopic ball 3, the telescopic ball 3 is compressed by pressure to play a role in frightening and expelling the birds, meanwhile, the distance between the upper connecting plates 1 is reduced, bird repelling spines 10 arranged on the upper connecting plates 1 are increased in the density of the telescopic balls 3, the birds cannot fall on the contracted telescopic balls 3, at the moment, the pull rope 4 is in a tensioning state, if the birds fall on the telescopic balls 3 adjacent to the contracted telescopic balls 3, the adjacent telescopic balls 3 are contracted under the action of the gravity of the birds, the pull rope 4 is pulled to pull the telescopic balls 3 which are contracted previously, the lengths of the telescopic balls 3 are eliminated, and the bird repelling effect can be realized without the help of wind power, the bird repelling effect is good; when sunlight is sufficient in the daytime, light irradiates on the protective rod 15, the light is reflected by the light reflecting layer on the protective rod 15, and birds cannot look straight to approach the protective rod; under windy condition, no matter which direction the wind blows, the wind can enter the spherical wind whistle 16 along the arc surface of the spherical wind whistle 16 to generate whistle sound, and the bird repelling effect can be further enhanced by the combination of the light, the sound, the extension and the contraction of the telescopic ball 3 and the like.
Claims (1)
1. The utility model provides a drive bird and prevent bird device of nesting, includes the drive bird subassembly with the help of locking Assembly and cross arm (9) rigid coupling, its characterized in that: the bird repelling component comprises a telescopic ball (3) with telescopic freedom degree formed by a group of mutually hinged movable components, the movable components comprise an upper connecting plate (1), a lower connecting plate (2), first connecting rods (5) and second connecting rods (6), the upper connecting plate (1) is respectively hinged with the four first connecting rods (5), the lower connecting plate (2) is respectively hinged with the four second connecting rods (6), the first connecting rods (5) and the second connecting rods (6) are arranged in a crossed manner, the crossed points of the first connecting rods (5) and the second connecting rods (6) are hinged nodes, the first connecting rods (5) in adjacent movable components are mutually hinged, the second connecting rods (6) in adjacent movable components are mutually hinged, and second hinged shafts (8) of the two mutually hinged second connecting rods (6) are crossed above first hinged shafts (7) of the two mutually hinged first connecting rods (5), a fixed point A (13) and a fixed point B (14) of the pull rope (4) are respectively arranged on two adjacent telescopic balls (3), the length of the pull rope (4) is L, wherein the distance between the fixed point A (13) and the fixed point B (14) on the two adjacent telescopic balls (3) in the extension state is S, the distance between the fixed point A (13) and the fixed point B (14) on the adjacent telescopic balls (3) in the extension state is L, wherein L is more than S, a protective rod (15) with a thorn-shaped end part and coated with a reflective layer is arranged on the periphery of each telescopic ball (3), the protective rod (15) is higher than the circle center of each telescopic ball (3) in the extension state, the distance between the adjacent protective rods (15) is smaller than the diameter of each telescopic ball (3) in the contraction state, a spherical wind whistle (16) is arranged on the rod body of each protective rod (15), the upper connecting plate (1) at the lowest point in the telescopic ball (3) is fixedly connected with the cross arm (9) by virtue of a locking assembly;
the telescopic ball (3) also comprises bird repelling thorns (10) vertically arranged on the upper connecting plate (1);
the first connecting rods (5) and the second connecting rods (6) are respectively arranged along the upper connecting plate (1) and the lower connecting plate (2) in a circumferential array;
the locking assembly comprises an Contraband type fixing frame (11) and a bolt (12) arranged on the Contraband type fixing frame (11), an upper connecting plate (1) and a guard bar (15) which are positioned at the lowest point in the telescopic ball (3) are fixedly connected with the Contraband type fixing frame (11) respectively, and the Contraband type fixing frame (11) is arranged on the periphery of the cross arm (9) and is locked and fixed by the bolt (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810421303.9A CN108812626B (en) | 2018-05-04 | 2018-05-04 | Bird repelling and bird nesting preventing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810421303.9A CN108812626B (en) | 2018-05-04 | 2018-05-04 | Bird repelling and bird nesting preventing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108812626A CN108812626A (en) | 2018-11-16 |
| CN108812626B true CN108812626B (en) | 2021-03-19 |
Family
ID=64147496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810421303.9A Active CN108812626B (en) | 2018-05-04 | 2018-05-04 | Bird repelling and bird nesting preventing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108812626B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002084960A (en) * | 2000-09-11 | 2002-03-26 | Toshio Aizawa | Bird repelling tool |
| JP2009225739A (en) * | 2008-03-24 | 2009-10-08 | Koyu Kk | Small animal approach-preventing device |
| CN102528905A (en) * | 2012-03-11 | 2012-07-04 | 唐敏峰 | Anvil pressing machine |
| CN204146216U (en) * | 2014-09-28 | 2015-02-11 | 魏彬 | A kind of scarer of electric tower |
| CN204302691U (en) * | 2014-12-15 | 2015-04-29 | 合肥磐石自动化科技有限公司 | A kind of computer program-control stretches ball Science and art display systems |
| CN204443895U (en) * | 2015-01-27 | 2015-07-08 | 河南四达电力设备股份有限公司 | A kind of bird-proof device |
| CN206275048U (en) * | 2016-11-02 | 2017-06-27 | 国网山东省电力公司武城县供电公司 | A kind of cross-direction shrinkage type occupying device |
| CN107316660A (en) * | 2016-04-27 | 2017-11-03 | 佛山市禾才科技服务有限公司 | A kind of flexible ball |
| CN207054624U (en) * | 2017-06-12 | 2018-03-02 | 国网河南鄢陵县供电公司 | A kind of bird-proof device for high tower |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6640506B2 (en) * | 2002-04-01 | 2003-11-04 | Phillip G. Landers | Bird deterrent apparatus |
-
2018
- 2018-05-04 CN CN201810421303.9A patent/CN108812626B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002084960A (en) * | 2000-09-11 | 2002-03-26 | Toshio Aizawa | Bird repelling tool |
| JP2009225739A (en) * | 2008-03-24 | 2009-10-08 | Koyu Kk | Small animal approach-preventing device |
| CN102528905A (en) * | 2012-03-11 | 2012-07-04 | 唐敏峰 | Anvil pressing machine |
| CN204146216U (en) * | 2014-09-28 | 2015-02-11 | 魏彬 | A kind of scarer of electric tower |
| CN204302691U (en) * | 2014-12-15 | 2015-04-29 | 合肥磐石自动化科技有限公司 | A kind of computer program-control stretches ball Science and art display systems |
| CN204443895U (en) * | 2015-01-27 | 2015-07-08 | 河南四达电力设备股份有限公司 | A kind of bird-proof device |
| CN107316660A (en) * | 2016-04-27 | 2017-11-03 | 佛山市禾才科技服务有限公司 | A kind of flexible ball |
| CN206275048U (en) * | 2016-11-02 | 2017-06-27 | 国网山东省电力公司武城县供电公司 | A kind of cross-direction shrinkage type occupying device |
| CN207054624U (en) * | 2017-06-12 | 2018-03-02 | 国网河南鄢陵县供电公司 | A kind of bird-proof device for high tower |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108812626A (en) | 2018-11-16 |
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