CN110261164A - A kind of sampling of river frost flower and content analysis device - Google Patents
A kind of sampling of river frost flower and content analysis device Download PDFInfo
- Publication number
- CN110261164A CN110261164A CN201910691756.8A CN201910691756A CN110261164A CN 110261164 A CN110261164 A CN 110261164A CN 201910691756 A CN201910691756 A CN 201910691756A CN 110261164 A CN110261164 A CN 110261164A
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- keel
- ring
- strainer
- capstan winch
- sampler
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- 238000005070 sampling Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 230000009189 diving Effects 0.000 claims abstract description 22
- 230000005484 gravity Effects 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000004973 liquid crystal related substance Substances 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 6
- 210000000988 bone and bone Anatomy 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 239000013078 crystal Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
-
- 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
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of samplings of river frost flower and content analysis device.The vehicle frame platform and axletree of the device connect, crawler belt is installed outside wheel, equipped with tower crane, gravity sensor and console on the vehicle frame platform, steering motor is fixed on the top of the tower crane, cantilever is installed in steering motor, overhead traveling crane is installed, diving sampler is connected by setting-out hawser with overhead traveling crane in cantilever；Diving sampler major part has: keel ring, the sampler keel being fixedly mounted with keel ring, the capping strainer installed in keel ring preset slot, rigid closer and frame the falling strainer certainly and fall anchor ring certainly on capping strainer of connection same layer two halves capping strainer.The configuration of the present invention is simple, job run is reliable and stable under pole cold air is waited, and saves labour, the frost flower content being convenient for measuring in designated depth water body.
Description
Technical field
The invention belongs to river frost flower sampled measurements technical field more particularly to a kind of sampling of river frost flower and content
Analytical equipment.
Background technique
Frost flower, which refers to, assembles the spongy ice cube formed by frazil, ice slush, slush or the latent ice compressed.Generally comprise suspension
Frazil ice, thin ice and the broken shore ice of Yu Shuizhong.
The formation of frost flower is caused by further radiating after water temperature drops to zero point.Frost flower is initially induced in river forms master
If since water flow heat exchange generates supercooling on water surface, to generate just Cheng Bingjing in water surface.The turbulent fluctuation of water flow is made
With making full face Anywhere can all have ice crystal appearance.As temperature continues to decline, ice crystal also increases therewith, just at ice crystal phase
Mutually bonding aggregation, gradually development development is the frost flower of various sizes and shape.The specific gravity of frost flower is more slightly lower than water, in water temperature close to ice
When point temperature, viscosity is very big, and with the raising of water temperature, viscosity is gradually decreased.When the turbulence intensity of water flow is larger, frost flower will
It is distributed in the entire cross-section of river, and with one of flow further downstream of fluid.The appearance of frazil ice changes the waterpower in river in river
Condition, thermal condition and boundary geometrical condition etc., ice berg once being formed under freezing period ice sheet, it will section conveyance capacity is caused to subtract
Small, upstream water level stops up height, and ice berg section water levels of upstream and downstream difference is caused to increase.Raising, the ice berg of upstream water level is burst lets out at present
Ice jam flood can cause submergence damage, bring massive losses to national economy.
The phenomenon that leading to ice slush disaster because of ice berg, is present in many areas in the world, and China is ice slush disaster in the world
One of more serious country.Annual winter, there are about the river of 3/4 national territorial area, lake it is different degrees of there are Ling Qing.And
Generation, differentiation and the disappearance of various ice slush phenomenons in river are required to carry out on the basis of precise measurement frost flower content, because
This, whether scientific research or the prediction to the condition of a disaster measure frost flower content with great section as basic data
Learn meaning.
Currently, the frost flower content observation method used both at home and abroad is mainly measured by road Bu Lansiji frost flower ruler.One
As frost flower ruler include collapsible frost flower ruler, umbrella shape frost flower ruler, iron net frost flower ruler, utilize the foldability of device from ice hole
It is lowered into water body, after reaching certain depth, device is above mentioned after being unfolded by manipulation device, so that device finally touches frost flower bottom
The thickness of frost flower is read afterwards.In addition, there are also there are also electric bell frost flower ruler and audition frost flower ruler, the road electric bell frost flower Chi Bu Lansiji ice
It improves, is pressed using frost flower collection so that electric bell is powered and sounding on the basis of flower ruler；Audition frost flower ruler is then the one of measuring staff
End fills a sealing metal box, lodges the alternative sounds of frost flower shock to measure the thickness and available depth of frost flower.But the above measurement
Device has the following disadvantages: that frost flower ruler volume is larger inconvenient to carry, and measurement work is highly dependent on the work of operator
Experience, and the subjective factor as caused by experience causes its measurement error larger, and can not further measure different water depth condition
Under water body frost flower content.
Summary of the invention
The purpose of the invention aiming at the above-mentioned problems of the prior art, propose a kind of river frost flower sampling with
Content analysis device.The configuration of the present invention is simple, the stable and reliable working performance under extremely cold environment, operates simple and convenient, measures work
Work is not high to technician's skill requirement, can be realized the frost flower measurement work of designated depth in river, can satisfy hydrological observation
With many-sided measurement demand such as scientific research, in addition, the innovation and creation also achieve, saving is artificial, reduces the purpose of labor intensity.
The technical solution of the invention is achieved in that a kind of river frost flower samples and content analysis device, vehicle
Body panel and axletree connect, and crawler belt are equipped with outside wheel, equipped with tower crane, gravity sensor and control on the vehicle frame platform
Platform is fixed with steering motor on the top of the tower crane, cantilever is equipped in steering motor, is equipped with overhead traveling crane in cantilever, dives
Water sampler is connected by setting-out hawser with overhead traveling crane.Cantilever is wrapped up by cantilever shell, is equipped with overhead traveling crane in the cantilever shell
Motor, the rotor in day vehicle motor are fixedly mounted with screw rod, and the external screw thread of screw rod and the internal screw thread of overhead traveling crane cooperate so that overhead traveling crane can
It is moved along screw rod.Its car is equipped with capstan winch motor I and capstan winch motor II, and rotor and I phase of capstan winch of capstan winch motor I are fixedly mounted with,
Winding is equipped with setting-out hawser on capstan winch I, and rotor and II phase of capstan winch of capstan winch motor II are fixedly mounted with, and winding, which is equipped with, on capstan winch II takes
Sample hawser.The sampler keel of diving sampler are packed between two keel rings up and down, are had on the keel ring not through ring
The preset slot of body can be inserted capping strainer in the preset slot, be equipped with guide wheel on the keel ring ring wall on the inside of preset slot,
The guide wheel is matched with the guide rail being packed on capping strainer, and capping strainer is moved in the preset slot of keel ring
It is dynamic；Magnetic stripe is fixed on the inside of capping strainer, and the magnetic stripe being fixedly mounted on the capping strainer being located in same keel ring has on the contrary
Magnetic pole；Rigid closer is fixed between capping strainer in same keel ring, rigid closer and sampling hawser connect
It connects；Keel ring positioned at diving sampler top is connect with setting-out hawser, and self-lubricating limit is fixed on the upside of the keel ring and is led
Rail；Limit feet is fixed on the downside of the keel ring of diving sampler lower part；Self-lubricating limit guide rail can be guided and is packed in
From fall on the downside of strainer fall certainly anchor ring along sampler keel fall, until from fall anchor ring fall in limit feet on；In lower part
Radio transmitted pressure formula water depth sensor is installed on the inside of keel ring.Console is equipped with liquid crystal display and key on interface,
Circuit assembly is installed, the circuit assembly is by single chip control unit, drive module, conversion module and general inside console
I/O is constituted, wherein single chip control unit and drive module, conversion module, general purpose I/O, key, wireless transport module are distinguished
Connection, liquid crystal display are connect by general purpose I/O with single chip control unit, and gravity sensor passes through conversion module and single-chip microcontroller
Control unit connection, steering motor, day vehicle motor, capstan winch motor I, capstan winch motor II are single by drive module and single-chip microcontroller control
Member connection, radio transmitted pressure formula water depth sensor are connect by wireless transport module with single chip control unit.
The invention structure novel, rationally, it is simple, installing and dismounting operates simple and convenient, does not depend on operator not only
Working experience, and save personnel amount, reduce labor intensity.The frost flower that the equipment can measure designated depth water body contains
Amount, is met needed for scientific research and hydrological observation with this.
Detailed description of the invention
Fig. 1 is a kind of sampling of river frost flower and content analysis apparatus structure schematic diagram；
Fig. 2 is cantilever design schematic diagram；
Fig. 3 is overhead traveling crane schematic diagram of internal structure；
Fig. 4 is diving sampler structure diagram；
Fig. 5 is diving the top of the sampler structural schematic diagram；
Fig. 6 is keel ring guide wheel, guide rail thin portion structural schematic diagram；
Fig. 7 is diving sampler bottom substance schematic diagram；
Fig. 8 is circuit assembly structural schematic diagram.
Piece number illustrates in figure:
1, cantilever；2, overhead traveling crane；3, diving sampler；4, gravity sensor；5, wheel；6, console；7, crawler belt；8, it hangs
Tower；9, steering motor；10, vehicle frame platform；101, day vehicle motor；102, screw rod；103, cantilever shell；201, capstan winch motor I；
202, capstan winch I；203, capstan winch motor II；204, capstan winch II；205, hawser is sampled；206, setting-out hawser；301, strainer is fallen certainly；
302, anchor ring is fallen certainly；303, strainer is covered；304, sampler keel；305, magnetic stripe；306, guide rail；307, rigid closer；
308, guide wheel；309, keel ring；310, feet is limited；311, self-lubricating limit guide rail；312, the radio transmitted pressure formula depth of water passes
Sensor；601, single chip control unit；602, general purpose I/O；603, liquid crystal display；604, conversion module；605, drive module；
606, key；607, circuit assembly；608, wireless transport module.
Specific embodiment
The invention embodiment is described in detail with reference to the accompanying drawing.A kind of sampling of river frost flower and content point
Analysis apparatus, vehicle frame platform 10 and 5 axis of wheel connect, and are equipped with crawler belt 7 outside wheel 5, equipped with hanging on the vehicle frame platform 10
Tower 8, gravity sensor 4 and console 6 are fixed with steering motor 9 on the top of the tower crane 8, are equipped in steering motor 9
Cantilever 1, overhead traveling crane 2 is equipped in cantilever 1, and diving sampler 3 is connected by setting-out hawser 206 with overhead traveling crane 2.Cantilever 1 is by cantilever
Shell 103 wraps up, and is equipped with day vehicle motor 101 in the cantilever shell 103, and the rotor in day vehicle motor 101 and screw rod 102 are solid
Dress, the external screw thread of screw rod 102 cooperate with the internal screw thread of overhead traveling crane 2 so that overhead traveling crane 2 can be moved along screw rod 102.Peace in overhead traveling crane 2
Equipped with capstan winch motor I 201 and capstan winch motor II 203, rotor and I 202 phase of capstan winch of capstan winch motor I 201 are fixedly mounted with, on capstan winch I 202
Winding is equipped with setting-out hawser 206, and rotor and II 204 phase of capstan winch of capstan winch motor II 203 are fixedly mounted with, and peace is wound on capstan winch II 204
Equipped with sampling hawser 205.The sampler keel 304 of diving sampler 3 are packed between two keel rings 309 up and down, the dragon
There is the preset slot not through ring body on bone ring 309, capping strainer 303 can be inserted in the preset slot, on the inside of preset slot
Guide wheel 308 is installed on 309 ring wall of keel ring, the guide wheel 308 is matched with the guide rail 306 being packed on capping strainer 303,
Capping strainer 303 is moved in the preset slot of keel ring 309；It is fixed with magnetic stripe 305 on the inside of capping strainer 303, and
The magnetic stripe 305 being fixedly mounted on capping strainer 303 in same keel ring 309 has opposite magnetic pole；Positioned at same keel
Rigid closer 307 is fixed between capping strainer 303 in ring 309, rigid closer 307 is connect with sampling hawser 205；Position
Keel ring 309 in diving 3 top of sampler is connect with setting-out hawser 206, and self-lubricating limit is fixed on the upside of the keel ring 309
Position guide rail 311；Limit feet 310 is fixed on the downside of the keel ring 309 of diving 3 lower part of sampler；Self-lubricating limit guide rail
311 can guide the anchor ring 302 that falls certainly for being packed in and being fallen on the downside of strainer 301 certainly to fall along sampler keel 304, until falling anchor certainly
Ring 302 is fallen in limit feet 310；Radio transmitted pressure formula water depth sensor is installed on the inside of the keel ring 309 of lower part
312.Liquid crystal display 603 and key 606 are installed on 6 interface of console, circuit assembly 607, institute are installed inside console 6
State circuit assembly 607 by single chip control unit 601, drive module 605, conversion module 604 and general purpose I/O (602 are constituted,
In, single chip control unit 601 and drive module 605, conversion module 604, general purpose I/O602, key 606, wireless transport module
608 are separately connected, and liquid crystal display 603 is connect by general purpose I/O602 with single chip control unit 601, and gravity sensor 4 is logical
It crosses conversion module 604 to connect with single chip control unit 601, steering motor 9, day vehicle motor 101, capstan winch motor I 201, capstan winch
Motor II 203 is connect by drive module 605 with single chip control unit 601, and radio transmitted pressure formula water depth sensor 312 is logical
Wireless transport module 608 is crossed to connect with single chip control unit 601.
In operation in use, a kind of sampling of river frost flower is passed through with content analysis device as the formulation position of measurement
Key 606 on operating console 6, single chip control unit 601 drive steering motor 9, day vehicle motor by drive module 605
101, capstan winch motor I 201 and capstan winch motor II 203 work, by diving sampler 3 by entering in advance at the hole that ice face is accomplished fluently
Measure water body, the depth of water of the constantly measurement dive of radio transmitted pressure formula water depth sensor 312.And pass through wireless transport module 608
Single chip control unit 601 is communicated information to, and operating personnel is shown to by liquid crystal display 603, reaches predetermined water
Single chip control unit 601 drives steering motor 9, day vehicle motor 101, I 201 and of capstan winch motor by drive module 605 when deep
Capstan winch motor II 203 work so that diving sampler 3 be parked in predetermined water layer, after water body disturbance disappear after, single-chip microcontroller control
Unit 601 processed drives capstan winch motor II 203 to work by drive module 605, drive of the capstan winch II 204 in capstan winch motor II 203
Lower rotation simultaneously starts winding sampling hawser 205, and sampling hawser 205 above proposes the branch for causing rigid closer 307 along closer direction
Fair weighing apparatus is destroyed and then drives the capping strainer 303 of two sides to close under the cooperation of guide rail 306 and guide wheel 308 under closure function
It closes, 303 tight closure of strainer is finally covered under the action of magnetic stripe 305；Due to the capping strainer at about 3 position of sampler of diving under water
303 closures, so that fall strainer 301 loses support to frame certainly on it, the self-lubricating limit guide rail 311 made of self-lubricating material
Limitation guidance under, fall certainly anchor ring 302 under the effect of gravity with fall certainly strainer 301 along sampler keel 304 slide, until falling certainly
Until being fallen under anchor ring 302 when being supported by limit feet 310.Hereafter, single chip control unit 601 passes through drive module 605
It drives steering motor 9, day vehicle motor 101, capstan winch motor I 201 and capstan winch motor II 203 to work, diving sampler 3 is proposed into ice
Face is placed on gravity sensor 4, gravity sensor 4 after liquid water in sampler 3 of diving under water empties under self gravitation effect
Single chip control unit 601 is transmitted signals to by conversion module 604, after the processing of single chip control unit 601, is passed through
General purpose I/O602 is shown in sampling time, sampling depth and frost flower content information on liquid crystal display 603, can pass through key
606 editor sampling positions.
Claims (5)
1. a kind of river frost flower sampling and content analysis device, it is characterised in that: vehicle frame platform (10) and wheel (5) axis connect, vehicle
Crawler belt (7) are installed outside wheel (5), equipped with tower crane (8), gravity sensor (4) and console on the vehicle frame platform (10)
(6), steering motor (9) are fixed on the top of the tower crane (8), are equipped on steering motor (9) cantilever (1), cantilever (1)
In be equipped with overhead traveling crane (2), diving sampler (3) is connected by setting-out hawser (206) with overhead traveling crane (2).
2. a kind of river frost flower sampling according to claim 1 and content analysis device, it is characterised in that: cantilever (1) by
Cantilever shell (103) package, the cantilever shell (103) is interior to be equipped with a day vehicle motor (101), is turned in day vehicle motor (101)
Son is fixedly mounted with screw rod (102), and the internal screw thread mutual cooperations of the external screw thread of screw rod (102) and overhead traveling crane (2) is so that overhead traveling crane (2) can be along
Screw rod (102) movement.
3. a kind of river frost flower sampling according to claim 2 and content analysis device, it is characterised in that: in overhead traveling crane (2)
Capstan winch motor I (201) and capstan winch motor II (203) are installed, rotor and the capstan winch I (202) of capstan winch motor I (201) are mutually fixedly mounted with,
Winding is equipped with setting-out hawser (206) on capstan winch I (202), and rotor and the capstan winch II (204) of capstan winch motor II (203) are mutually fixedly mounted with,
Winding is equipped with sampling hawser (205) on capstan winch II (204).
4. a kind of river frost flower sampling according to claim 1 and content analysis device, it is characterised in that: diving sampler
(3) sampler keel (304) are packed between two keel rings (309) up and down, are had on the keel ring (309) not through ring
The preset slot of body, can be inserted capping strainer (303) in the preset slot, on keel ring (309) ring wall on the inside of preset slot
It is equipped with guide wheel (308), the guide wheel (308) matches with the guide rail (306) being packed in capping strainer (303), so that envelope
Lid strainer (303) can move in the preset slot of keel ring (309)；Magnetic stripe (305) are fixed on the inside of capping strainer (303),
And the magnetic stripe (305) being fixedly mounted on the capping strainer (303) being located in same keel ring (309) has opposite magnetic pole；It is located at
Be fixed with rigid closer (307) between capping strainer (303) in same keel ring (309), rigid closer (307) with take
Sample hawser (205) connection；Keel ring (309) positioned at diving sampler (3) top is connect with setting-out hawser (206), the dragon
Self-lubricating limit guide rail (311) are fixed on the upside of bone ring (309)；On the downside of the keel ring (309) of diving sampler (3) lower part
It is fixed with limit feet (310)；Self-lubricating limit guide rail (311) can guide to be packed in falls falling on the downside of strainer (301) certainly certainly
Anchor ring (302) along sampler keel (304) fall, until from fall anchor ring (302) fall in limit feet (310) on；In lower part
Keel ring (309) on the inside of radio transmitted pressure formula water depth sensor (312) is installed.
5. a kind of river frost flower sampling according to claim 1 and content analysis device, it is characterised in that: console (6)
Liquid crystal display (603) and key (606) are installed on interface, are equipped with circuit assembly (607) inside console (6), it is described
Circuit assembly (607) is by single chip control unit (601), drive module (605), conversion module (604) and general purpose I/O (602)
It constitutes, wherein single chip control unit (601) and drive module (605), conversion module (604), general purpose I/O (602), key
(606), wireless transport module (608) is separately connected, and liquid crystal display (603) is single by general purpose I/O (602) and single-chip microcontroller control
First (601) connection, gravity sensor (4) are connect by conversion module (604) with single chip control unit (601), steering motor
(9), day vehicle motor (101), capstan winch motor I (201), capstan winch motor II (203) are controlled by drive module (605) and single-chip microcontroller
Unit (601) connection, radio transmitted pressure formula water depth sensor (312) are controlled by wireless transport module (608) and single-chip microcontroller
Unit (601) connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910691756.8A CN110261164B (en) | 2019-07-29 | 2019-07-29 | River ice flower sampling and content analysis device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910691756.8A CN110261164B (en) | 2019-07-29 | 2019-07-29 | River ice flower sampling and content analysis device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110261164A true CN110261164A (en) | 2019-09-20 |
| CN110261164B CN110261164B (en) | 2023-12-29 |
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ID=67912342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910691756.8A Active CN110261164B (en) | 2019-07-29 | 2019-07-29 | River ice flower sampling and content analysis device |
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| CN (1) | CN110261164B (en) |
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