CN113680720A - Video monitoring system for tracking high-altitude falling objects - Google Patents

Video monitoring system for tracking high-altitude falling objects Download PDF

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Publication number
CN113680720A
CN113680720A CN202110945213.1A CN202110945213A CN113680720A CN 113680720 A CN113680720 A CN 113680720A CN 202110945213 A CN202110945213 A CN 202110945213A CN 113680720 A CN113680720 A CN 113680720A
Authority
CN
China
Prior art keywords
cleaning head
water
glass window
outlet pipe
driving
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.)
Pending
Application number
CN202110945213.1A
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Chinese (zh)
Inventor
郑崧
袁康乐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei Cement Research and Design Institute Co Ltd
Original Assignee
Hefei Cement Research and Design Institute Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hefei Cement Research and Design Institute Co Ltd filed Critical Hefei Cement Research and Design Institute Co Ltd
Priority to CN202110945213.1A priority Critical patent/CN113680720A/en
Publication of CN113680720A publication Critical patent/CN113680720A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/16—Rigid blades, e.g. scrapers; Flexible blades, e.g. wipers
    • B08B1/165—Scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
    • E03B3/02—Methods or installations for obtaining or collecting drinking water or tap water from rain-water
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/108—Rainwater harvesting

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

The invention discloses a video monitoring system for tracking high-altitude falling objects, which comprises an upright post and a video probe arranged on the upright post, wherein the video probe is provided with a glass window, and a cleaning assembly for cleaning the glass window is also arranged on the upright post; the cleaning assembly comprises a cleaning head arranged outside the glass window and a driving unit arranged on the stand column, the driving unit comprises a water collecting tank fixedly arranged on the stand column, the bottom of the water collecting tank is provided with a water outlet pipe, the water outlet end of the water outlet pipe is communicated with a driving cylinder arranged on the stand column, a rotating assembly is arranged in the driving cylinder, the rotating assembly is driven to rotate by water flow flowing out of the water outlet pipe, the output end of the rotating assembly is in transmission connection with the cleaning head, and the cleaning head is driven to move along the outer side surface of the glass window through the driving of the rotating assembly. When the device is used in rainy days, the moisture on the window glass can be timely scraped, so that the video monitoring system can shoot more clearly.

Description

Video monitoring system for tracking high-altitude falling objects
Technical Field
The invention relates to a video monitoring technology, in particular to a video monitoring system for tracking high-altitude falling objects.
Background
With the development of the times, people have higher security awareness, a video monitoring system is more popular among people as an important part of the security system, a monitoring camera is more spread over every corner of the people as the most important part of the video monitoring system, and the monitoring camera is a semiconductor imaging device and has the advantages of high sensitivity, strong light resistance, small distortion, small size, long service life, vibration resistance and the like.
However, the security system of the monitoring camera is basically in a paralyzed state when it is used in a rainy day, especially in a rainstorm, because the glass window in the camera housing accumulates a large amount of moisture, which causes a serious light refraction, and thus, the operation of the monitoring camera in a rainy day is not desirable.
Disclosure of Invention
In order to solve the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a video monitoring system for tracking falling objects in high altitude, which can timely scrape off moisture on a window glass when the video monitoring system is used in rainy days, so that the video monitoring system can shoot clearly.
The technical scheme adopted by the invention for solving the technical problems is as follows: a video monitoring system for tracking high-altitude falling objects comprises an upright post and a video probe arranged on the upright post, wherein the video probe is provided with a glass window, and a cleaning assembly for cleaning the glass window is also arranged on the upright post;
the cleaning assembly comprises a cleaning head arranged on the outer side of the glass window and a driving unit arranged on the upright post, the cleaning head moves back and forth on the outer side surface of the glass window through the driving unit, and the inner side surface of the cleaning head is attached to the outer side surface of the glass window;
the drive unit includes fixed mounting and is in header tank on the stand, the bottom of header tank is equipped with the outlet pipe, the play water end of outlet pipe and the driving cylinder intercommunication of installing on the stand, be equipped with rotating assembly in the driving cylinder, rotating assembly passes through the rivers drive that flows out in the outlet pipe is rotatory, rotating assembly's output with the cleaning head transmission is connected, makes the cleaning head passes through rotating assembly's drive is along the outside surface removal of glass window.
Optionally, the video probe has a housing, and a covering portion for covering the glass window is disposed at a front end of the housing, so that the glass window is retracted inside the covering portion;
the cover portion has a top length greater than a bottom length.
Optionally, the water outlet pipe comprises a U-shaped section and a straight pipe section;
the U-shaped section is inverted inside the water collecting tank, the straight pipe section is fixed at the bottom of the water collecting tank, the top of the straight pipe section extends upwards from the bottom of the water collecting tank, one end of the U-shaped section is fixedly connected with the top of the straight pipe section, and the other end of the U-shaped section is suspended inside the water collecting tank, so that a gap is formed between the suspended end of the U-shaped section and the bottom of the water collecting tank;
the height of the top of the U-shaped section is lower than that of the top of the water collecting tank.
Optionally, the straight pipe section is provided with an expanding part and a contracting part at the connecting position with the bottom of the water collecting tank, wherein the expanding part and the contracting part are symmetrical conical pipes;
and the inner diameter of the straight pipe section of the water outlet pipe is consistent with that of the U-shaped section.
Optionally, the rotating assembly includes a rotating shaft and a water blocking plate fixedly mounted on the rotating shaft, two ends of the rotating shaft are rotatably connected with the inner wall of the driving cylinder through bearings, respectively, and one end of the rotating shaft penetrates through the driving cylinder;
the end part of the rotating shaft penetrating out of the driving cylinder is in transmission connection with the cleaning head.
Optionally, one end of the rotating shaft, which penetrates out of the driving cylinder, is fixedly connected with the cam;
the outer wall of the driving cylinder is also connected with a driving rod in a sliding manner, the bottom of the driving rod is contacted with the rim of the cam, and the other end of the driving rod is fixedly connected with the bottom of the cleaning head;
the convex width of the cam is matched with the width of the window glass, so that the moving distance of the cleaning head covers the window glass.
Optionally, an outwardly protruding guide groove is formed in the outer wall of the driving cylinder, and the driving rod is slidably connected with the guide groove, so that the driving rod moves linearly;
the driving rod is fixedly provided with a baffle at the part below the guide groove, and a spring is sleeved at the part of the driving rod between the baffle and the guide groove.
Optionally, a through groove for adapting the cleaning head is formed in the bottom of the covering part of the shell;
the top of the driving rod is fixedly connected with the cleaning head through a thin plate, and the thickness of the thin plate is smaller than that of the cleaning head, so that the thickness of the thin plate is smaller than the width of the through groove.
Optionally, the inner diameter of the driving cylinder is larger than the outer diameter of the water outlet pipe;
the water outlet end of the water outlet pipe is inserted into the driving cylinder and is positioned above the side part of the rotating shaft, so that the water outlet end of the water outlet pipe is just arranged above the water blocking plate positioned on one side of the rotating shaft.
Optionally, an arc-shaped recessed area is formed in the surface of the water blocking plate, so that when the water blocking plate rotates to a position below the water outlet end, the recessed area is located on the upper surface of the water blocking plate.
By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. when the video monitoring system is used in rainy days, moisture on a glass window of the video monitoring system can be timely scraped, so that the shooting definition of the video monitoring system is improved, and the phenomenon of high-altitude falling objects can be conveniently tracked with better resolution;
2. the video monitoring system provided by the invention can be realized by depending on rainwater collected in rainy days without electric power or manpower when water on the glass window is scraped, so that energy is saved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the outlet pipe of the present invention;
FIG. 3 is a schematic view of the internal structure of the driving cylinder of the present invention;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
figure 5 is a schematic view of the connection of the drive rod of the present invention to the cleaning head.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, the present invention discloses a video monitoring system for tracking high-altitude falling objects, which relies on the video monitoring device of the prior art to make it have better shooting definition when used in rainy days, therefore, the video monitoring system for tracking high-altitude falling objects of the present invention should have the video monitoring device of the prior art, for example, a column, a video probe 2 installed on the column, and the video probe 2 should also have a housing 4 and a glass window 3 located at the front end of the housing 4, the front end of the housing 4 is provided with a covering portion for covering the glass 3 window, so that the glass window is retracted inside the covering portion, and the top length of the covering portion is greater than the bottom length.
In the invention, the upright post is also provided with a cleaning assembly for cleaning the glass window 3, and the cleaning assembly can utilize collected rainwater as driving force to finally scrape off moisture on the glass window 3.
Particularly, the cleaning assembly is including locating the cleaning head 1 outside glass window 3 and installing the drive unit on the stand, and cleaning head 1 reciprocates at the outside surface of glass window 3 through drive unit to the realization is to the operation of scraping off moisture of glass window 3. Therefore, the inner surface of the cleaning head 1 (i.e., the wiping surface of the cleaning head 1) and the outer surface of the glass window 3 need to be attached to each other.
In the invention, as shown in fig. 1 and 2, the driving unit comprises a water collecting tank 5 fixedly installed on the upright column, a water outlet pipe 6 is arranged at the bottom of the water collecting tank 5, the water outlet end of the water outlet pipe 6 is communicated with a driving cylinder 7 installed on the upright column, a rotating assembly is arranged in the driving cylinder 7, the rotating assembly is driven to rotate by water flow flowing out of the water outlet pipe 6, and the output end of the rotating assembly is in transmission connection with the cleaning head 1, so that the cleaning head 1 moves along the outer side surface of the glass window 3 by the driving of the rotating assembly. The bottom of the driving cylinder 7 has an opening to discharge the water flow.
Specifically, as shown in fig. 2, the water outlet pipe 6 includes a U-shaped section 601 and a straight pipe section 602. The straight pipe section of the water outlet pipe has the same inner diameter with the U-shaped section. The U-shaped section 601 is inverted inside the water collection tank 5, and the straight pipe section 602 is fixed at the bottom of the water collection tank 5 and penetrates out of the water collection tank 5. The top of the straight pipe section 602 extends upwards from the bottom of the water collecting tank 5, one end of the U-shaped section 601 is fixedly connected with the top of the straight pipe section 602, and the other end of the U-shaped section is suspended inside the water collecting tank 5, so that a gap is formed between the suspended end of the U-shaped section 601 and the bottom of the water collecting tank 5, and the height of the top of the U-shaped section 601 is lower than that of the top of the water collecting tank 5.
When being in rainy day weather, the rainwater is absorbed by header tank 5, because outlet pipe 6 has U type section, consequently, in rainwater collection prophase, the rainwater can not flow from outlet pipe 6, when the surface of water height in header tank 5 is higher than the top height of U type section 601, because the height of the play water end of straight tube section 602 is less than the bottom height of header tank 5, consequently, under the effect of siphon, the water in header tank 5 is arranged in drive cylinder 7, because the rotation of drive rotating assembly, and then makes cleaner head 1 reciprocate.
In the present invention, as shown in fig. 2, the straight pipe section 602 is provided with an enlarged diameter portion 603 and a constricted portion 604 at the connecting position with the bottom of the header tank 5, and the enlarged diameter portion 603 and the constricted portion 604 are tapered pipes symmetrical to each other. By the arrangement of the expanding part 603 and the contracting part 604, the water flow has a large tension effect when passing through the expanding part 603 and the contracting part 604, and the siphon effect of the water outlet pipe 6 is improved.
In the invention, as shown in fig. 3 and 4, the rotating assembly comprises a rotating shaft 8 and a water-blocking plate 9 fixedly installed on the rotating shaft 8, two ends of the rotating shaft 8 are respectively rotatably connected with the inner wall of the driving cylinder 7 through bearings, one end of the rotating shaft 8 penetrates out of the driving cylinder 7 is fixedly connected with a cam 10, and the convex amplitude of the cam 10 is adapted to the width of the window glass 3, so that the moving distance of the cleaning head 1 covers the window glass 3. The outer wall of the driving cylinder 7 is also connected with a driving rod 11 in a sliding way, the bottom of the driving rod 11 is contacted with the rim of the cam 10, and the other end of the driving rod is fixedly connected with the bottom of the cleaning head 1. With this arrangement, when the rotating assembly receives water flow, the water flow impacts the water blocking plate 9, so that the rotating shaft 8 rotates, the rotation of the rotating shaft 8 drives the cam 10 to rotate therewith, and the cam 10 drives the driving rod 11, so that the driving rod 11 continuously slides up and down to move the cleaning head 1 up and down.
Specifically, as shown in fig. 3, the outer wall of the driving cylinder 7 is provided with a guide groove 12 protruding outward, and the driving rod 11 is slidably connected to the guide groove 12, so that the driving rod 11 moves linearly. The driving rod 11 is also fixedly provided with a baffle 13 at the part below the guide groove 12, and the part of the driving rod 11 between the baffle 13 and the guide groove 12 is also sleeved with a spring 14, so that the bottom of the driving rod 11 is constrained outside the cam 10 under the action of the spring 14, and thus, when cleaning is not needed, the cleaning head 1 can be contracted at the bottom of the covering part, and the driving rod 11 is prevented from blocking the glass window 3.
In the invention, a through groove for adapting the cleaning head 1 is arranged at the bottom of the covering part of the shell 4, so that the cleaning head 1 is retracted in the through groove to prevent blocking of a glass window when cleaning is not needed. Based on this, as shown in fig. 5, the top of the driving rod 11 can be fixedly connected with the cleaning head 1 through a thin plate 15, and the thickness of the thin plate 15 is smaller than that of the cleaning head 1, so that the thickness of the thin plate 15 is smaller than the width of the through groove. In this way, the width of the through slot can be made as small as possible.
In addition, in the invention, the inner diameter of the driving cylinder 7 is larger than the outer diameter of the water outlet pipe 6, the water outlet end of the water outlet pipe 6 is inserted into the driving cylinder 7, and the water outlet end is positioned above the side part of the rotating shaft 8, so that the water outlet end of the water outlet pipe 6 is just arranged above the water-blocking plate 9 positioned on one side of the rotating shaft 8, when water flows out of the water outlet pipe, the water can impact the water-blocking plate 9 on one side of the rotating shaft 8, and the water can not impact the water-blocking plate on the other side of the rotating shaft 8, thereby improving the rotating efficiency of the rotating shaft 8.
In the present invention, as shown in fig. 4, an arc-shaped concave area 16 may be further provided on the surface of the water blocking plate 9, so that when the water blocking plate 9 is rotated to below the water outlet end, the concave area 16 is located on the upper surface of the water blocking plate 9. By providing the recessed area 16, the water flow can temporarily stay on the surface of the water blocking plate 9, so that the weight of the water blocking plate 9 on the side of the rotating shaft 8 is increased, and the rotating efficiency of the rotating shaft 8 is improved.
In the present invention, a plurality of other water collecting devices may be further provided and the collected rainwater is guided into the water collecting tank 5 to increase the water collecting speed of the water collecting tank 5. When the rainwater collection speed and the drainage speed in the water collection tank 5 reach the same speed, the cleaning head 1 works consistently until the water in the water collection tank 5 is drained completely.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Other technical features than those described in the specification are known to those skilled in the art, and are not described herein in detail in order to highlight the innovative features of the present invention.

Claims (10)

1. A video monitoring system for tracking high-altitude falling objects is characterized by comprising an upright post and a video probe arranged on the upright post, wherein the video probe is provided with a glass window, and a cleaning assembly for cleaning the glass window is also arranged on the upright post;
the cleaning assembly comprises a cleaning head arranged on the outer side of the glass window and a driving unit arranged on the upright post, the cleaning head moves back and forth on the outer side surface of the glass window through the driving unit, and the inner side surface of the cleaning head is attached to the outer side surface of the glass window;
the drive unit includes fixed mounting and is in header tank on the stand, the bottom of header tank is equipped with the outlet pipe, the play water end of outlet pipe and the driving cylinder intercommunication of installing on the stand, be equipped with rotating assembly in the driving cylinder, rotating assembly passes through the rivers drive that flows out in the outlet pipe is rotatory, rotating assembly's output with the cleaning head transmission is connected, makes the cleaning head passes through rotating assembly's drive is along the outside surface removal of glass window.
2. The video monitoring system for tracking high-altitude falling objects according to claim 1, wherein the video probe is provided with a shell, the front end of the shell is provided with a covering part for shielding the glass window, so that the glass window is contracted in the inside of the covering part;
the cover portion has a top length greater than a bottom length.
3. The video surveillance system for tracking high-altitude falling objects according to claim 2, wherein the water outlet pipe comprises a U-shaped section and a straight pipe section;
the U-shaped section is inverted inside the water collecting tank, the straight pipe section is fixed at the bottom of the water collecting tank, the top of the straight pipe section extends upwards from the bottom of the water collecting tank, one end of the U-shaped section is fixedly connected with the top of the straight pipe section, and the other end of the U-shaped section is suspended inside the water collecting tank, so that a gap is formed between the suspended end of the U-shaped section and the bottom of the water collecting tank;
the height of the top of the U-shaped section is lower than that of the top of the water collecting tank.
4. The video surveillance system for tracking high-altitude falling objects according to claim 3, characterized in that the straight pipe section is provided with an expanded diameter portion and a contracted portion at the connecting position with the bottom of the water collecting tank, wherein the expanded diameter portion and the contracted portion are symmetrical conical pipes;
and the inner diameter of the straight pipe section of the water outlet pipe is consistent with that of the U-shaped section.
5. The video monitoring system for tracking high-altitude falling objects according to claim 4, wherein the rotating assembly comprises a rotating shaft and a water blocking plate fixedly mounted on the rotating shaft, two ends of the rotating shaft are respectively rotatably connected with the inner wall of the driving cylinder through bearings, and one end of the rotating shaft penetrates out of the driving cylinder;
the end part of the rotating shaft penetrating out of the driving cylinder is in transmission connection with the cleaning head.
6. The video monitoring system for tracking high-altitude falling objects according to claim 5, wherein one end of the rotating shaft, which penetrates out of the driving barrel, is fixedly connected with the cam;
the outer wall of the driving cylinder is also connected with a driving rod in a sliding manner, the bottom of the driving rod is contacted with the rim of the cam, and the other end of the driving rod is fixedly connected with the bottom of the cleaning head;
the convex width of the cam is matched with the width of the window glass, so that the moving distance of the cleaning head covers the window glass.
7. The video monitoring system for tracking high-altitude falling objects according to claim 6, wherein a guide groove protruding outwards is formed in an outer wall of the driving cylinder, and the driving rod is slidably connected with the guide groove so that the driving rod moves in a straight line;
the driving rod is fixedly provided with a baffle at the part below the guide groove, and a spring is sleeved at the part of the driving rod between the baffle and the guide groove.
8. The video surveillance system for tracking high altitude falls according to claim 7, characterized in that a bottom of the cover portion of the housing is provided with a through slot for fitting of the cleaning head;
the top of the driving rod is fixedly connected with the cleaning head through a thin plate, and the thickness of the thin plate is smaller than that of the cleaning head, so that the thickness of the thin plate is smaller than the width of the through groove.
9. The video surveillance system for tracking high altitude falls according to claim 8, wherein the inner diameter of the drive cylinder is larger than the outer diameter of the outlet pipe;
the water outlet end of the water outlet pipe is inserted into the driving cylinder and is positioned above the side part of the rotating shaft, so that the water outlet end of the water outlet pipe is just arranged above the water blocking plate positioned on one side of the rotating shaft.
10. The video surveillance system for tracking high altitude falling objects of claim 9, wherein the surface of the water blocking plate is provided with an arc-shaped recessed area, such that when the water blocking plate is rotated below the water outlet end, the recessed area is located on the upper surface of the water blocking plate.
CN202110945213.1A 2021-08-17 2021-08-17 Video monitoring system for tracking high-altitude falling objects Pending CN113680720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110945213.1A CN113680720A (en) 2021-08-17 2021-08-17 Video monitoring system for tracking high-altitude falling objects

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110945213.1A CN113680720A (en) 2021-08-17 2021-08-17 Video monitoring system for tracking high-altitude falling objects

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CN113680720A true CN113680720A (en) 2021-11-23

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CN206176255U (en) * 2016-10-31 2017-05-17 南京普兰宁建设工程咨询有限公司 Energy -saving road lamp
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US20160238838A1 (en) * 2013-12-27 2016-08-18 Asc Corporation Monitoring camera device
CN206176255U (en) * 2016-10-31 2017-05-17 南京普兰宁建设工程咨询有限公司 Energy -saving road lamp
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CN111761495A (en) * 2020-06-29 2020-10-13 深圳源泰建设工程有限公司 Energy-saving electric cutting machine with cleaning function

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Application publication date: 20211123