CN110850063A - Biodiversity check out test set is used in gardens - Google Patents
Biodiversity check out test set is used in gardens Download PDFInfo
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- CN110850063A CN110850063A CN201911194958.8A CN201911194958A CN110850063A CN 110850063 A CN110850063 A CN 110850063A CN 201911194958 A CN201911194958 A CN 201911194958A CN 110850063 A CN110850063 A CN 110850063A
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- detecting apparatus
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 89
- 238000001514 detection method Methods 0.000 claims abstract description 45
- 238000003756 stirring Methods 0.000 claims abstract description 41
- 238000005070 sampling Methods 0.000 claims abstract description 19
- 238000003760 magnetic stirring Methods 0.000 claims description 9
- 230000007306 turnover Effects 0.000 claims description 2
- 239000002689 soil Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 239000012153 distilled water Substances 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/08—Radiation
- A61L2/10—Ultraviolet radiation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N2001/1031—Sampling from special places
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Immunology (AREA)
- General Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Public Health (AREA)
- Remote Sensing (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Veterinary Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- Epidemiology (AREA)
- Hydrology & Water Resources (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a bio-diversity detection device for gardens, which comprises a base, wherein a device box is placed above the base, a water tank is arranged behind the device box, a water storage box is placed inside the water tank, a water pump is arranged inside the water storage box, the upper end of the water pump is connected with a first water pipe, a rotary faucet connecting piece is arranged at the top of the water storage box, a second water pipe is rotatably connected above the rotary faucet connecting piece, a faucet is fixedly connected to the other end of the second water pipe, an electromagnetic valve and a flowmeter are arranged at the joint of the faucet and the second water pipe, a detection table is arranged at the upper side in front of the device box, a magnetic stirrer and a microscope are arranged above the detection table, a stirring tank is placed above the magnetic stirrer, a cover body is arranged above the stirring tank, a connecting hole and a sampling hole are formed in the cover body, a connecting shaft; the invention has the advantages of accurate detection result and simple operation.
Description
Technical Field
The invention belongs to the technical field of biodiversity detection, and particularly relates to biodiversity detection equipment for gardens.
Background
During garden construction, vegetation is needed to be planted for beautifying and evolving air, and the growth of the vegetation is important, so that the detection of soil organisms becomes particularly important, the detection of the soil organisms can help to select more suitable plants for planting, and the garden construction is facilitated; most of the existing garden biodiversity detection equipment directly puts soil into a stirring tank, adds water and stirs for detection; in the detection process, the water capacity and the soil quality are not accurately quantified, so that the detection result is easily influenced and inaccurate; therefore, a bio-diversity detection apparatus for gardens is required.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the biological diversity detection equipment for the gardens, which has accurate detection result and simple operation.
The purpose of the invention is realized as follows: a bio-diversity detection device for gardens comprises a base, wherein side plates are arranged on the side edges of the base, batteries are arranged inside the base, a device box is placed above the base and consists of a water tank, a detection table and a storage box, a water tank is arranged behind the device box, a water storage box is placed inside the water tank, a water pump is arranged inside the water storage box, the upper end of the water pump is connected with a first water pipe, a rotary faucet connecting piece is arranged at the top of the water storage box, the upper end of the first water pipe is fixedly connected with the rotary faucet connecting piece, and a second water pipe is rotatably connected above the rotary faucet connecting piece, so that the second water pipe can rotate conveniently, and the bio-diversity detection device is more convenient to use; the other end of the second water pipe is fixedly connected with a water faucet, a solenoid valve and a flowmeter are arranged at the joint of the water faucet and the second water pipe, a solenoid valve switch electrically connected with the solenoid valve, the flowmeter, a water pump and a battery is arranged outside the second water pipe, a detection table is arranged on the upper side in front of the device box, a turnover plate is hinged in front of the detection table, a magnetic stirrer and a microscope are arranged above the detection table, a stirring tank is placed above the magnetic stirrer, a cover body is arranged above the stirring tank, a connecting hole and a sampling hole are formed in the cover body, a connecting shaft penetrates through the connecting hole, stirring paddles are arranged around the connecting shaft, a magnetic stirring rod is fixedly connected at the bottom of the connecting shaft, a fixed block is sleeved above the connecting shaft, and a containing bag is arranged on the side edge of the, the utility model discloses a solar energy collecting device, including storage bag, ultraviolet fluorescent tube, controller, detection platform, device case, connecting post, connecting wire, connecting box, connecting post, connecting wire between the inside spliced post of first connecting piece and the inside spliced post of the nearest second connecting piece of same level distance, the inboard of storage bag is provided with rubber head burette and ultraviolet fluorescent tube, ultraviolet fluorescent tube and battery pass through the power cord and connect, be provided with the controller on the power cord, the below of examining test table is provided with the storage box, all be provided with the spout on the left and right sides inner wall of device case, the bottom and the spout sliding connection of storage box, the storage box all is provided.
The four corners below the base are provided with wheels.
The right side of the side plate is provided with a handle.
And plug bodies are arranged at the sampling holes.
The fixed block can move up and down on the connecting shaft.
The sampling holes are at least 2 and have different sizes.
The stirring tank is a beaker or a volumetric flask.
The containing box is provided with a plurality of, and inside all is provided with the buffer layer.
The model of the magnetic stirrer is JC-HJ-2A.
A water inlet pipe is arranged above the water storage tank.
The invention has the beneficial effects that: before the invention is used, the preset value of the flowmeter is determined according to the quality of soil and the volume-fixed capacity; when the water pump is used, the stirring tank is sterilized, then soil with a certain mass is weighed and placed into the stirring tank, then the electromagnetic valve switch is opened, the electromagnetic valve switch is electrically connected with the electromagnetic valve, the flowmeter and the water pump, so that the water pump pumps water out, the water is metered by the flowmeter, when the volume of the water flowing out reaches the preset value of the flowmeter, the flowmeter converts the volume signal detected by the flowmeter into an electric signal and transmits the electric signal to the electromagnetic valve switch, and the electromagnetic valve switch is closed; at the moment, the volume of water is smaller than the constant volume, and then the constant volume is carried out on the solution, so that the condition that an inspector needs to carefully observe the stirring tank all the time in the using process is avoided, and the workload of the inspector is reduced; then, the cover body is placed above the stirring tank, the height of the connecting shaft is adjusted, the magnetic stirring rod is made to contact with the bottom of the stirring tank, and the magnetic stirrer is started to stir the magnetic stirring rod; after stirring, sampling and detecting through a sampling hole; cleaning the stirring tank, drying the cleaned stirring tank, covering the cover body, opening a larger sampling hole, putting the ultraviolet lamp tube into the cover body, and sterilizing the ultraviolet lamp tube for the next use; the detected sample retains the retained value of the detected sample and is placed in the containing box for further detection; in summary, the present invention has the advantages of accurate detection result and simple operation.
Drawings
FIG. 1 is a block diagram of a biological diversity measuring apparatus for gardens according to the present invention.
FIG. 2 is a view showing a construction of a stirring tank of the biological diversity measuring apparatus for gardens according to the present invention.
FIG. 3 is a view showing a structure of a water reservoir of the bio-diversity measuring apparatus for gardens according to the present invention.
Wherein: 1. the device comprises a base 2, a side plate 3, a device box 4, a water tank 5, a water storage tank 6, a detection table 7, a storage box 8, a storage bag 9, a first connecting piece 10, a connecting column 11, a connecting line 12, a sliding chute 13, a turning plate 14, a magnetic stirrer 15, a microscope 16, a rubber head dropper 17, an ultraviolet lamp tube 18, a power line 19, a controller 20, a battery 21, a magnetic stirring rod 22, a connecting shaft 23, a stirring paddle 24, a cover body 25, a connecting hole 26, a fixing block 27, a sampling hole 28, a stirring tank 29, a first water tube 30, a water pump 31, a rotary faucet connecting piece 32, a second water tube 33, a faucet 34, an electromagnetic valve 35, an electromagnetic valve switch 36, a second connecting piece 37, a flowmeter 38, a handle 39.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1-3, a bio-diversity detection device for gardens comprises a base 1, a side plate 2 is arranged on the side of the base 1, a battery 20 is arranged inside the base 1, a device box 3 is placed above the base 1, the device box 3 is composed of a water tank 4, a detection table 6 and a storage box 7, a water tank 4 is arranged behind the device box 3, a water storage tank 5 is placed inside the water tank 4, distilled water is contained in the water storage tank, and the distilled water can reduce detection errors and make the result more accurate; a water pump 30 is arranged in the water storage tank 5, the upper end of the water pump 30 is connected with a first water pipe 29, the top of the water storage tank 5 is provided with a rotary faucet connecting piece, the upper end of the first water pipe 29 is fixedly connected with the rotary faucet connecting piece 31, a second water pipe 32 is rotatably connected above the rotary faucet connecting piece 31, the other end of the second water pipe 32 is fixedly connected with a faucet 33, a solenoid valve 34 and a flow meter 37 are arranged at the joint of the water tap 33 and the second water pipe 32, the second water pipe 32 is externally provided with an electromagnetic valve switch 35 electrically connected with the electromagnetic valve 34, the flowmeter 37, the water pump 30 and the battery 20, a detection table 6 is arranged on the upper side in front of the device box 3, a turning plate 13 is hinged in front of the detection table 6, the turning plate and the detection table are closed, the safety of equipment can be protected, and the turning plate is opened to facilitate detection; a magnetic stirrer 14 and a microscope 15 are arranged above the detection table 6, a stirring tank 28 is arranged above the magnetic stirrer 14, a cover body 24 is arranged above the stirring tank 28, a connecting hole 25 and a sampling hole 27 are arranged on the cover body 24, a connecting shaft 22 penetrates through the connecting hole 25, a stirring paddle 23 is arranged around the connecting shaft 22, the bottom of the connecting shaft 22 is fixedly connected with a magnetic stirring rod 21, a fixed block 26 is sleeved above the connecting shaft 22, a receiving bag 8 is arranged at the side of the detection table 6, a rubber head dropper 16 and an ultraviolet lamp tube 17 are arranged at the inner side of the receiving bag 8, the ultraviolet lamp tube 17 is connected with the battery 20 through a power line 18, the controller 19 is arranged on the power line 18, and the ultraviolet lamp tube can sterilize the used stirring tank, so that a great error caused by a next detection result is avoided; a containing box 7 is arranged below the detection table 6, sliding grooves 12 are formed in the inner walls of the left side and the right side of the device box 3, the bottom of the containing box 7 is connected with the sliding grooves 12 in a sliding mode, first connecting pieces 9 are arranged on the left side and the right side of the containing box 7 and the turning plate 13, second connecting pieces 36 are arranged on the left side wall and the right side wall of the device box 3, connecting columns 10 are inserted into the first connecting pieces 9 and the second connecting pieces 36, and the connecting columns 10 in the first connecting pieces 9 are connected with the connecting columns 10 in the second connecting pieces 36 which are closest to the same horizontal height through connecting lines 11; the four corners below the base 1 are provided with wheels, so that the transportation is facilitated; the handle 38 is arranged on the right side of the side plate 2, so that the transportation is facilitated; the sampling holes 27 are all provided with plugs, so that the test sample is prevented from overflowing in the stirring process, and the microorganisms in the air are prevented from entering the stirring tank to cause errors on the detection result; the fixed block 26 can move up and down on the connecting shaft 22, so that the connecting shaft is suitable for stirring tanks with various heights; the number of the sampling holes 27 is at least 2, and the sampling holes are different in size, so that sampling and sterilization are facilitated; the stirring tank 28 is a beaker or a volumetric flask, and both the beaker and the volumetric flask can perform constant volume on the test substance, so that the detection result is more valuable; a plurality of storage boxes 7 are arranged, and the tested test pieces can be stored; buffer layers are arranged inside the buffer layers; the damage degree of the test article in the moving process is reduced; the model of the magnetic stirrer 14 is JC-HJ-2A; a water inlet pipe 39 is arranged above the water storage tank 5.
The invention has the beneficial effects that: before the invention is used, the preset value of the flowmeter is determined according to the quality of soil and the volume-fixed capacity; when the device is used, the stirring tank is sterilized, then soil with a certain mass is weighed and placed into the stirring tank, then the electromagnetic valve switch is opened, and the electromagnetic valve switch is electrically connected with the electromagnetic valve, the flowmeter and the water pump, so that the distilled water is pumped out by the water pump and is metered by the flowmeter, when the volume of the water flowing out reaches the preset value of the flowmeter, the volume signal detected by the flowmeter is converted into an electric signal by the flowmeter and is transmitted to the electromagnetic valve switch, and the electromagnetic valve switch is closed; at the moment, the volume of water is smaller than the constant volume, and then the constant volume is carried out on the solution, so that the condition that an inspector needs to carefully observe the stirring tank all the time in the using process is avoided, and the workload of the inspector is reduced; then, the cover body is placed above the stirring tank, the height of the connecting shaft is adjusted, the magnetic stirring rod is made to contact with the bottom of the stirring tank, and the magnetic stirrer is started to stir the magnetic stirring rod; after stirring, sampling and detecting through a sampling hole; cleaning the stirring tank, drying the cleaned stirring tank, covering the cover body, opening a larger sampling hole, putting the ultraviolet lamp tube into the cover body, and sterilizing the ultraviolet lamp tube for the next use; the detected sample retains the retained value of the detected sample and is placed in the containing box for further detection; a plurality of storage boxes are arranged, so that the tested test articles can be stored; buffer layers are arranged inside the test piece, so that the damage degree of the test piece in the moving process is reduced; in summary, the present invention has the advantages of accurate detection result and simple operation.
Claims (10)
1. The utility model provides a biodiversity check out test set is used in gardens, includes the base, the side of base is provided with the curb plate, the inside of base is provided with the battery, the device case, its characterized in that have been placed to the top of base: the device box consists of a water tank, a detection table and a storage box, the water tank is arranged at the rear part of the device box, a water storage box is placed in the water tank, a water pump is arranged in the water storage box, the upper end of the water pump is connected with a first water pipe, a rotary faucet connecting piece is arranged at the top part of the water storage box, the upper end of the first water pipe is fixedly connected with the rotary faucet connecting piece, a second water pipe is rotatably connected above the rotary faucet connecting piece, the other end of the second water pipe is fixedly connected with a faucet, a solenoid valve and a flowmeter are arranged at the joint of the faucet and the second water pipe, a solenoid valve switch electrically connected with the solenoid valve, the flowmeter, the water pump and a battery is arranged outside the second water pipe, the detection table is arranged at the upper side in front of the device box, a turnover plate is hinged in front of the detection table, and a, a stirring tank is placed above the magnetic stirring machine, a cover body is arranged above the stirring tank, a connecting hole and a sampling hole are formed in the cover body, a connecting shaft penetrates through the connecting hole, a stirring paddle is arranged around the connecting shaft, a magnetic stirring rod is fixedly connected to the bottom of the connecting shaft, a fixing block is sleeved above the connecting shaft, a containing bag is arranged on the side edge of the detection table, a rubber head dropper and an ultraviolet lamp tube are arranged on the inner side of the containing bag, the ultraviolet lamp tube is connected with a battery through a power line, a controller is arranged on the power line, a containing box is arranged below the detection table, sliding grooves are formed in the inner walls of the left side and the right side of the device box, the bottom of the containing box is connected with the sliding grooves in a sliding manner, first connecting pieces are arranged on the left side and the right side of the containing box and a turning plate, second connecting pieces are, the connecting columns are inserted into the first connecting piece and the second connecting piece, and the connecting column in the first connecting piece is connected with the connecting column in the second connecting piece which is closest to the same horizontal height through a connecting line.
2. The biodiversity detecting apparatus for gardens of claim 1, wherein: the four corners below the base are provided with wheels.
3. The biodiversity detecting apparatus for gardens of claim 1, wherein: the right side of the side plate is provided with a handle.
4. The biodiversity detecting apparatus for gardens of claim 1, wherein: and plug bodies are arranged at the sampling holes.
5. The biodiversity detecting apparatus for gardens of claim 1, wherein: the fixed block can move up and down on the connecting shaft.
6. The biodiversity detecting apparatus for gardens of claim 1, wherein: the sampling holes are at least 2 and have different sizes.
7. The biodiversity detecting apparatus for gardens of claim 1, wherein: the stirring tank is a beaker or a volumetric flask.
8. The biodiversity detecting apparatus for gardens of claim 1, wherein: the containing box is provided with a plurality of, and inside all is provided with the buffer layer.
9. The biodiversity detecting apparatus for gardens of claim 1, wherein: the model of the magnetic stirrer is JC-HJ-2A.
10. The biodiversity detecting apparatus for gardens of claim 1, wherein: a water inlet pipe is arranged above the water storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911194958.8A CN110850063A (en) | 2019-11-28 | 2019-11-28 | Biodiversity check out test set is used in gardens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911194958.8A CN110850063A (en) | 2019-11-28 | 2019-11-28 | Biodiversity check out test set is used in gardens |
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| Publication Number | Publication Date |
|---|---|
| CN110850063A true CN110850063A (en) | 2020-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911194958.8A Pending CN110850063A (en) | 2019-11-28 | 2019-11-28 | Biodiversity check out test set is used in gardens |
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| CN (1) | CN110850063A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112444613A (en) * | 2020-11-03 | 2021-03-05 | 广东电网有限责任公司 | Portable chloride ion content detector |
| CN112444612A (en) * | 2020-11-03 | 2021-03-05 | 广东电网有限责任公司 | Portable chloride ion content detector |
| CN112444614A (en) * | 2020-11-03 | 2021-03-05 | 广东电网有限责任公司 | Portable chloride ion content detector |
| CN113484082A (en) * | 2021-07-06 | 2021-10-08 | 青海九零六工程勘察设计院 | Dedicated sewage quality of water verifying attachment of environmental protection detection |
| CN114568984A (en) * | 2022-03-22 | 2022-06-03 | 浙江怡亚信智能科技有限公司 | Multifunctional bathroom cabinet based on Internet of things |
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| CN104483465A (en) * | 2014-12-16 | 2015-04-01 | 上海交通大学 | Ecological grassed swale simulation experiment device and experiment operating method thereof |
| CN206002332U (en) * | 2016-07-19 | 2017-03-08 | 王成良 | A kind of intelligence picks up pretreatment soil agricultural special-purpose vehicles |
| CN208780631U (en) * | 2018-08-24 | 2019-04-23 | 深圳市永丰生态环境有限公司 | A kind of gardens bio-diversity detection device |
| CN208902715U (en) * | 2018-09-18 | 2019-05-24 | 新昌县大市聚镇海房机械厂 | A kind of garden soil detection device |
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2019
- 2019-11-28 CN CN201911194958.8A patent/CN110850063A/en active Pending
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| CN206002332U (en) * | 2016-07-19 | 2017-03-08 | 王成良 | A kind of intelligence picks up pretreatment soil agricultural special-purpose vehicles |
| CN208780631U (en) * | 2018-08-24 | 2019-04-23 | 深圳市永丰生态环境有限公司 | A kind of gardens bio-diversity detection device |
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| Title |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112444613A (en) * | 2020-11-03 | 2021-03-05 | 广东电网有限责任公司 | Portable chloride ion content detector |
| CN112444612A (en) * | 2020-11-03 | 2021-03-05 | 广东电网有限责任公司 | Portable chloride ion content detector |
| CN112444614A (en) * | 2020-11-03 | 2021-03-05 | 广东电网有限责任公司 | Portable chloride ion content detector |
| CN112444614B (en) * | 2020-11-03 | 2022-01-18 | 广东电网有限责任公司 | Portable chloride ion content detector |
| CN112444612B (en) * | 2020-11-03 | 2022-06-28 | 广东电网有限责任公司 | Portable chloride ion content detector |
| CN113484082A (en) * | 2021-07-06 | 2021-10-08 | 青海九零六工程勘察设计院 | Dedicated sewage quality of water verifying attachment of environmental protection detection |
| CN114568984A (en) * | 2022-03-22 | 2022-06-03 | 浙江怡亚信智能科技有限公司 | Multifunctional bathroom cabinet based on Internet of things |
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Application publication date: 20200228 |
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