CN107316563A - A kind of electronic information direction board - Google Patents
A kind of electronic information direction board Download PDFInfo
- Publication number
- CN107316563A CN107316563A CN201710675389.3A CN201710675389A CN107316563A CN 107316563 A CN107316563 A CN 107316563A CN 201710675389 A CN201710675389 A CN 201710675389A CN 107316563 A CN107316563 A CN 107316563A
- Authority
- CN
- China
- Prior art keywords
- support
- electronic information
- leg
- direction board
- information direction
- 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
Links
- 230000033228 biological regulation Effects 0.000 claims abstract description 20
- 239000000956 alloy Substances 0.000 claims description 15
- 229910045601 alloy Inorganic materials 0.000 claims description 15
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 229910052684 Cerium Inorganic materials 0.000 claims description 10
- 229910052804 chromium Inorganic materials 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 10
- 229910052746 lanthanum Inorganic materials 0.000 claims description 10
- 229910052748 manganese Inorganic materials 0.000 claims description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 10
- 229910052706 scandium Inorganic materials 0.000 claims description 10
- 229910052720 vanadium Inorganic materials 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 229910052758 niobium Inorganic materials 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005286 illumination Methods 0.000 description 2
- 230000001932 seasonal effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S30/00—Arrangements for moving or orienting solar heat collector modules
- F24S30/40—Arrangements for moving or orienting solar heat collector modules for rotary movement
- F24S30/42—Arrangements for moving or orienting solar heat collector modules for rotary movement with only one rotation axis
- F24S30/425—Horizontal axis
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
- H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S30/00—Arrangements for moving or orienting solar heat collector modules
- F24S2030/10—Special components
- F24S2030/13—Transmissions
- F24S2030/133—Transmissions in the form of flexible elements, e.g. belts, chains, ropes
-
- 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
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/47—Mountings or tracking
-
- 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
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
The invention discloses a kind of electronic information direction board, regulation leg before including, connect stull, after adjust leg, regulation leg is connected by connecting stull with rear regulation leg before described, the upper end of regulation leg is provided with seat before described, the upper end of regulation leg is provided with support after described, the front end of the support, which is inlayed, is provided with display screen, solar energy equipment is installed at the top of the display screen, the solar energy equipment includes solar panel, jointed shaft, flexible rope and sucker, the middle part of the solar panel is hinged on a display screen using jointed shaft, one end of the solar panel is connected using jointed shaft with flexible rope, the lower end of the flexible rope is connected with sucker, it is close to the back side of display screen the lower end of the sucker；Electronic information signboard structure is simple, easy to install for this, facilitate pedestrian's sunshade, improves the utilization rate of solar energy, it is ensured that electronic information board reliability of operation and stability.
Description
Technical field
The invention belongs to electronic direction board technical field, more particularly to a kind of electronic information direction board.
Background technology
At present, with the continuous progress and the continuous quickening of city step of society, businessman publicizes to shop article
When, eliminate the reliance on mostly and carried out publicity attraction customer using traditional loudspeaker, wasted time and energy using this traditional method,
Publicity has a certain impact to throat for a long time.Most businessman uses erects electronic information board on doorway, makes its passing people's group energy
It is open-and-shut to observe related information, then decided whether to buy into shop according to the demand of oneself, and electronic information board is accounted for
Ground area is small, do not interfere with yet other articles put or passing crowd walking, therefore, electronic information board uses scope
Extensively, and demand is big.But the height that general electronic information board is deposited is unadjustable, and is powered using civil power, once stop
After electricity, just influence whether to use, and current electronic information board is typically installed by the way of fixed, is used very not square
Just, moreover, height can not typically be adjusted, the using effect of user is affected.
The content of the invention
There is problem to solve the above, the present invention provides a kind of electronic information direction board, it is easy to install, facilitate row
People's sunshade, improves the utilization rate of solar energy, it is ensured that the electronic information of electronic information board reliability of operation and stability is indicated
Board
The technical problems to be solved by the invention are achieved through the following technical solutions：
A kind of electronic information direction board, adjusts leg, connection stull, adjusts leg afterwards, the preceding regulation leg passes through connection before including
Stull is connected with rear regulation leg, and the upper end of the preceding regulation leg is provided with seat, and the upper end of the rear regulation leg is provided with
Support, the front end of the support, which is inlayed, is provided with display screen, and solar energy equipment is provided with the top of the support.
Further, the solar energy equipment includes solar panel, and the middle part of solar panel uses jointed shaft
It is hinged on support, one end of solar panel is connect by jointed shaft with flexible rope chain, the lower end of flexible rope is connected with sucker.
Further, the back side of the support is also equipped with battery, the output end of solar energy equipment and the input of battery
End is connected.
Further, the back side of the support, which is provided with switch board, switch board, is provided with signal receiver, display screen,
Switch board and signal receiver are connected with accumulator output end.
Further, the preceding regulation leg below rear regulation leg with being equipped with roller, and the roller is using self-locking roller.
Further, the support is made up of the material of following percentage by weight：C：0.25-0.30%, Mo：0.5-1.5%,
Cr：0.5-1.5%, Mn：0.5-1.0%, Ni：1.5-2.0%, Cu：1.0-2.0%, Si：0.2-0.3%, Ce：0.5-0.7%, La：
0.25-0.50%, Sc:0.1-0.15%, Nb:0.03-0.06%, V：0.01-0.08%, surplus is Fe and inevitable impurity.
Further, the preparation method of the support is as follows：
1）C is taken by weight percentage：0.25-0.30%, Mo：0.5-1.5%, Cr：0.5-1.5%, Mn：0.5-1.0%, Ni：1.5-
2.0%, Cu：1.0-2.0%, Si：0.2-0.3%, Ce：0.5-0.7%, La：0.25-0.50%, Sc:0.1-0.15%, Nb:0.03-
0.06%, V：0.01-0.08%, surplus is Fe and inevitable impurity；
2）Using coreless induction furnace vacuum protection melting, the uniform alloy pig of composition is obtained, and alloy pig is placed on to the big crucible in stove
In；
3）Cover bell to vacuumize, begun to warm up when vacuum reaches 0.1 × 10-3Pa in stove, when alloy pig metal in stove
It is completely melt, maintains this temperature, refines 10-20 minutes, and stir 20-30 times；
4）Stopping is vacuumized, applying argon gas, pressure 0.01-0.05Pa, and using continuous drawing casting method, speed 20-60mm/min is obtained
Obtain support.
The beneficial effect that is reached of the present invention is：Electronic information board top is provided with solar panels, converts solar energy into
While electric energy, pedestrian's sunshade can be facilitated, while also by the way that the inclination angle of solar panel is set into what can be adjusted, can
The need for Various Seasonal, the angle of inclination of solar panel is adjusted, the utilization rate of solar energy is improved, it is ensured that e-mail
Board reliability of operation and stability are ceased, the place of rest is provided to pedestrian, display can be easily seen while pedestrian's rest
On advertisement, increase advertisement propagation dynamics, using green energy resource, be convenient for people to use.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Embodiment
In order to further describe the technical characterstic and effect of the present invention, below in conjunction with the drawings and specific embodiments to this hair
It is bright to be described further.
Embodiment 1
Shown in reference picture 1, a kind of electronic information direction board adjusts leg, connection stull, adjusts leg afterwards, its feature exists before including
In：Regulation leg 1 is connected by connecting stull 2 with rear regulation leg 3 before described, and the upper end of the preceding regulation leg 1 is provided with seat
Chair 5, the upper end of the rear regulation leg 3 is provided with support 6, and the front end of the support 6, which is inlayed, is provided with display screen 7, the support 6
Top solar energy equipment 8 is installed.The solar energy equipment 8 is included in solar panel 81, solar panel 81
Portion is hinged on the frame 6 using jointed shaft 82, and one end of solar panel 81 is linked by jointed shaft 82 with flexible rope 83, is stretched
The lower end of contracting rope 83 is connected with sucker 84.The back side of the support 6 is also equipped with battery 11, the output end of solar energy equipment 8 with
The input of battery 11 is connected.The back side of the support 6 is provided with switch board 9, switch board 9 and is provided with signal receiver
10, display screen 7, switch board 9 and signal receiver 10 are connected with the output end of battery 11.Regulation leg 1 and rear tune before described
The lower section of section leg 3 is equipped with roller 4, and the roller 4 uses self-locking roller.
The support is made up of the material of following percentage by weight：C：0.25%, Mo：0.5%, Cr：0.5%, Mn：0.5%,
Ni：1.5%, Cu：1.0%, Si：0.2-0.3%, Ce：0.5%, La：0.25%, Sc:0.1, Nb:0.03%, V：0.01%, surplus is Fe
With inevitable impurity.
The preparation method of the support is as follows：
1）C is taken by weight percentage：0.25%, Mo：0.5%, Cr：0.5%, Mn：0.5%, Ni：1.5%, Cu：1.0%, Si：0.2-
0.3%, Ce：0.5%, La：0.25%, Sc:0.1, Nb:0.03%, V：0.01%, surplus is Fe and inevitable impurity；
2）Using coreless induction furnace vacuum protection melting, the uniform alloy pig of composition is obtained, and alloy pig is placed on to the big crucible in stove
In；
3）Cover bell to vacuumize, begun to warm up when vacuum reaches 0.1 × 10-3Pa in stove, when alloy pig metal in stove
It is completely melt, maintains this temperature, refines 10-20 minutes, and stir 20-30 times；
4）Stopping is vacuumized, applying argon gas, pressure 0.01-0.05Pa, and using continuous drawing casting method, speed 20-60mm/min is obtained
Obtain support.
Embodiment 2（The difference of embodiment 2,3 and embodiment 1 essentially consists in material and the preparation of support, remaining and embodiment
1 is identical）
The support is made up of the material of following percentage by weight：C：0.30%, Mo：1.5%, Cr：1.5%, Mn：1.0%, Ni：
2.0%, Cu：2.0%, Si：0.3%, Ce：0.7%, La：0.50%, Sc:0.15, Nb:0.06%, V：0.08%, surplus is Fe and can not
The impurity avoided.
The preparation method of the support is as follows：
1）C is taken by weight percentage：0.30%, Mo：1.5%, Cr：1.5%, Mn：1.0%, Ni：2.0%, Cu：2.0%, Si：0.3%,
Ce：0.7%, La：0.50%, Sc:0.15, Nb:0.06%, V：0.08%, surplus is Fe and inevitable impurity；
2）Using coreless induction furnace vacuum protection melting, the uniform alloy pig of composition is obtained, and alloy pig is placed on to the big crucible in stove
In；
3）Cover bell to vacuumize, begun to warm up when vacuum reaches 0.1 × 10-3Pa in stove, when alloy pig metal in stove
It is completely melt, maintains this temperature, refines 10-20 minutes, and stir 20-30 times；
4）Stopping is vacuumized, applying argon gas, pressure 0.01-0.05Pa, and using continuous drawing casting method, speed 20-60mm/min is obtained
Obtain support.
Embodiment 3
The support is made up of the material of following percentage by weight：C：0.27%, Mo：0.5-1.5%, Cr：0.9%, Mn：0.7%,
Ni：1.9%, Cu：1.5%, Si：0.25%, Ce：0.6%, La：0.38%, Sc:0.12%, Nb:0.04%, V：0.04%, surplus is Fe
With inevitable impurity.
The preparation method of the support is as follows：
1）C is taken by weight percentage：0.27%, Mo：0.5-1.5%, Cr：0.9%, Mn：0.7%, Ni：1.9%, Cu：1.5%, Si：
0.25%, Ce：0.6%, La：0.38%, Sc:0.12%, Nb:0.04%, V：0.04%, surplus is Fe and inevitable impurity；
2）Using coreless induction furnace vacuum protection melting, the uniform alloy pig of composition is obtained, and alloy pig is placed on to the big crucible in stove
In；
3）Cover bell to vacuumize, begun to warm up when vacuum reaches 0.1 × 10-3Pa in stove, when alloy pig metal in stove
It is completely melt, maintains this temperature, refines 10-20 minutes, and stir 20-30 times；
4）Stopping is vacuumized, applying argon gas, pressure 0.01-0.05Pa, and using continuous drawing casting method, speed 20-60mm/min is obtained
Obtain support.
When use, the electric energy of conversion is sent to battery 11 and stored by solar energy equipment 8, signal receiver 10,
Switch board 9 and display screen 7 are powered by battery 11.Signal receiver 10 receives vision signal and shown on display screen 7.
, can be by pulling flexible rope 83 to adjust solar panel in order to obtain the illumination of maximum according to the illumination of Various Seasonal
81 angle, improves sunlight utilization, is then positioned the lower end absorption of sucker 14 at the back side of support 6.Seat 5 allows
The individual advertisement that pedestrian can be easily seen on display screen when rest, improves the communication effect of advertisement.
Above-described embodiment does not limit the present invention in any form, and all forms for taking equivalent substitution or equivalent transformation are obtained
Technical scheme, be within the scope of the present invention.
Claims (8)
1. a kind of electronic information direction board, adjusts leg, connection stull, adjusts leg afterwards before including, it is characterised in that：Adjusted before described
Save leg（1）By connecting stull（2）With rear regulation leg（3）It is connected, the preceding regulation leg（1）Upper end seat is installed
（5）, the rear regulation leg（3）Upper end support is installed（6）, the support（6）Front end inlay display screen be installed（7）,
The support（6）Top solar energy equipment is installed（8）.
2. a kind of electronic information direction board according to claim 1, it is characterised in that：The solar energy equipment（8）Including
Solar panel（81）, solar panel（81）Middle part use jointed shaft（82）It is hinged on support（6）On, solar-electricity
Pond plate（81）One end pass through jointed shaft（82）With flexible rope（83）Link, stretch rope（83）Lower end be connected with sucker（84）.
3. a kind of electronic information direction board according to claim 2, it is characterised in that：The support（6）The back side also fill
There is battery（11）, solar energy equipment（8）Output end and battery（11）Input be connected.
4. a kind of electronic information direction board according to claim 3, it is characterised in that：The support（6）The back side install
There is switch board（9）, switch board（9）On signal receiver is installed（10）, display screen（7）, switch board（9）And signal receiver
（10）And battery（11）Output end is connected.
5. a kind of electronic information direction board according to claim 1, it is characterised in that：Regulation leg before described（1）Adjusted with rear
Save leg（3）Lower section be equipped with roller（4）.
6. a kind of electronic information direction board according to claim 5, it is characterised in that：The roller（4）Using self-locking
Roller.
7. a kind of electronic information direction board according to claim 5, it is characterised in that：The support is by following weight percent
The material composition of ratio：C：0.25-0.30%, Mo：0.5-1.5%, Cr：0.5-1.5%, Mn：0.5-1.0%, Ni：1.5-2.0%, Cu：
1.0-2.0%, Si：0.2-0.3%, Ce：0.5-0.7%, La：0.25-0.50%, Sc:0.1-0.15%, Nb:0.03-0.06%, V：
0.01-0.08%, surplus is Fe and inevitable impurity.
8. electronic information direction board according to claim 6, it is characterised in that：The preparation method of the support includes as follows
Step：
1）C is taken by weight percentage：0.25-0.30%, Mo：0.5-1.5%, Cr：0.5-1.5%, Mn：0.5-1.0%, Ni：1.5-
2.0%, Cu：1.0-2.0%, Si：0.2-0.3%, Ce：0.5-0.7%, La：0.25-0.50%, Sc:0.1-0.15%, Nb:0.03-
0.06%, V：0.01-0.08%, surplus is Fe and inevitable impurity；
2）Using coreless induction furnace vacuum protection melting, the uniform alloy pig of composition is obtained, and alloy pig is placed on to the big crucible in stove
In；
3）Cover bell to vacuumize, begun to warm up when vacuum reaches 0.1 × 10-3Pa in stove, when alloy pig metal in stove
It is completely melt, maintains this temperature, refines 10-20 minutes, and stir 20-30 times；
4）Stopping is vacuumized, applying argon gas, pressure 0.01-0.05Pa, and using continuous drawing casting method, speed 20-60mm/min is obtained
Obtain support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710675389.3A CN107316563A (en) | 2017-08-09 | 2017-08-09 | A kind of electronic information direction board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710675389.3A CN107316563A (en) | 2017-08-09 | 2017-08-09 | A kind of electronic information direction board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107316563A true CN107316563A (en) | 2017-11-03 |
Family
ID=60174826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710675389.3A Pending CN107316563A (en) | 2017-08-09 | 2017-08-09 | A kind of electronic information direction board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107316563A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108182875A (en) * | 2017-12-29 | 2018-06-19 | 重庆市长寿区鸿川农业开发有限公司 | A kind of convertible direction board |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101332500A (en) * | 2007-06-28 | 2008-12-31 | 张克坚 | Negative-pressure casting method of cast |
| CN204613755U (en) * | 2015-04-01 | 2015-09-02 | 肖培亮 | A kind of solar energy electronic massaging device |
| CN205329573U (en) * | 2016-01-23 | 2016-06-22 | 上海航键航空设备有限公司 | Solar energy traffic sign that gives way that parks |
| CN205645124U (en) * | 2016-03-21 | 2016-10-12 | 天津怿然科技有限公司 | Solar energy electronic information brand |
| CN205680362U (en) * | 2016-05-30 | 2016-11-09 | 天水师范学院 | A kind of solar energy electronic message board |
| CN206363692U (en) * | 2017-01-06 | 2017-07-28 | 四川职业技术学院 | Solar energy electronic message board |
-
2017
- 2017-08-09 CN CN201710675389.3A patent/CN107316563A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101332500A (en) * | 2007-06-28 | 2008-12-31 | 张克坚 | Negative-pressure casting method of cast |
| CN204613755U (en) * | 2015-04-01 | 2015-09-02 | 肖培亮 | A kind of solar energy electronic massaging device |
| CN205329573U (en) * | 2016-01-23 | 2016-06-22 | 上海航键航空设备有限公司 | Solar energy traffic sign that gives way that parks |
| CN205645124U (en) * | 2016-03-21 | 2016-10-12 | 天津怿然科技有限公司 | Solar energy electronic information brand |
| CN205680362U (en) * | 2016-05-30 | 2016-11-09 | 天水师范学院 | A kind of solar energy electronic message board |
| CN206363692U (en) * | 2017-01-06 | 2017-07-28 | 四川职业技术学院 | Solar energy electronic message board |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108182875A (en) * | 2017-12-29 | 2018-06-19 | 重庆市长寿区鸿川农业开发有限公司 | A kind of convertible direction board |
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