CN101000335A - Automatic surveying and sampling device for runoff water flow of farmland or hillside fields - Google Patents
Automatic surveying and sampling device for runoff water flow of farmland or hillside fields Download PDFInfo
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- CN101000335A CN101000335A CN 200610165291 CN200610165291A CN101000335A CN 101000335 A CN101000335 A CN 101000335A CN 200610165291 CN200610165291 CN 200610165291 CN 200610165291 A CN200610165291 A CN 200610165291A CN 101000335 A CN101000335 A CN 101000335A
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- tipping bucket
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Abstract
An automatic-surveying device of farmland radial-flow water consists of box set with supporting frame of rotary shaft, water flow rectifying unit with water outlet, tripper-hopper with two hoppers being set on said supporting frame, sampling rotary disc set with socket holes for holding test tubes, driving device for driving said disc to move along one direction, sampler for conveying radial-flow water into test tube, guiding arm for controlling open-close of test tube and rotary disc switch for raising up guiding arm when tripper-hopper is rotated.
Description
Technical field
The present invention relates to farmland or runoff of sloping field water monitoring and sampler automatically.
Background technology
The severe problem that migration is present China ecology, environment in the earth of soil erosion, pollution of area source, agricultural ground nutrient loss, pollutant and nutrient, agriculture and forestry faced, and runoff is the occasioner and the main carrier of these processes.Therefore, people attach great importance to the research of runoff and monitoring, only China from 1994 up to the present, the scientific paper of delivering on all kinds of natural science periodicals relevant with runoff reached 7087 pieces (obtaining by the retrieval to " CJFD (CJFD) "), wherein more than 330 piece of a piece of writing, run in depth and interflow surplus farmland and the slope runoff 600, these papers relate generally to ambits such as agricultural, forestry, environment, ecology, water and soil conservation, the hydrology, geology from nearly 500 scientific research institutions in the whole nation (containing university).As seen, the research to runoff is crucial.
The primary basis of research runoff is accurately to measure runoff, has the measuring technique of pressure, high water head, big flow, continuity runoff very ripe for river flow is this.Yet for no pressure, low water head, low discharge, intermittent runoff as agricultural run-off, slope runoff, soil permeability stream etc., what adopt basically at present is the water collecting basin method, promptly build a runoff pond (some has part flow arrangement) in the runoff exit, runoff water is collected in the pond, then the water in the calculated product pond.The plash method has apparent in view shortcoming: 1) can only measure the total amount of runoff, and can not observe the runoff generating process, be i.e. cumulative path flow, instantaneous through flow velocity and time relation curve; 2) can not collect the runoff water sample automatically, also just can't analyze the footpath flowable state of materials such as nutrient in the runoff water, agricultural chemicals, silt, i.e. cumulative flow vector, instantaneous loss speed and time relation curve can only analyze last total number of dropouts of these materials; When 3) run-off is big, spillover takes place easily, and under the underground water table condition with higher, the underground water phenomenon of osmosis takes place easily, excludes and plash can't permeate error with these; 4) can't eliminate influence of evaporation.The ultimate principle of plash method is that runoff water is accumulated, disposable then measurement, but as long as in the plash water is arranged, evaporation from water surface will take place, in the process that runoff water accumulates gradually, water surface evaporation also builds up.Particularly, because the randomness that runoff takes place is quite strong, back (particularly nocturnal runoff) takes place in runoff, runs into the situation that is difficult in time measure the plash water yield through regular meeting, and the evaporation from water surface error will be bigger; 5) plash belongs to the stationarity facility, and maneuverability is poor, is difficult to realize the multiple spot monitoring.Over the past two years, there are 3～4 pieces of academic articles to discuss available tipping bucket and accurately measure no pressure, low water head, low discharge, intermittent runoff, Chengdu soughing of the wind in the pines numeral science and technology have been developed CR2-L type double skip flowmeter (also having only model machine at present), can comparatively accurately measure no pressure, low water head, low discharge, intermittent runoff in 0.2mm～35mm scope, can analyze the runoff process, but, still can't analyze the runoff process of runoff water inclusions such as nutrient, agricultural chemicals, pollutant, silt in observation process because the runoff water sample can not be collected automatically.
Summary of the invention
Farmland of the present invention or runoff of sloping field water are monitored automatically and sampler is characterised in that, comprising: a casing, and two sides relative at this casing are provided with tipping bucket rotation axis bracing frame; One current fairing is provided with water delivering orifice in the bottom of this current fairing, and the position of the position of this water delivering orifice and tipping bucket rotation axis is roughly on a vertical line; One tipping bucket, this tipping bucket have two small rooms, and the oxygon cube that these two small rooms are two symmetries is provided with the tipping bucket rotation axis in the bottom of two small rooms, and this tipping bucket rotation axis is supported on the above-mentioned tipping bucket rotation axis bracing frame; One sample-containing turntable is provided with the test tube jack on the surface of sample-containing turntable, and its top was a little more than the surface of this sample-containing turntable when test tube inserted this test tube jack; Drive unit, this drive unit are used to drive described sample-containing turntable and rotate along a direction; Sampler, the runoff water that this sampler is rotated at described tipping bucket, pouring moment is measured certain volume, bottom in this sampler is connected with flexible pipe, and the other end of this flexible pipe is fixed on the positioning end of guide arm described later, is used for runoff water is transported to guide arm test tube pointed; Guide arm, this guide arm can vertically move up and down, one end of this guide arm is provided with baffle plate, this baffle plate when this guide arm is in the position that falls, can be hooked in above-mentioned test tube protrude in sample-containing turntable the end and with the water delivering orifice of above-mentioned flexible pipe be positioned at this test tube above, be in when lifting the position at this guide arm, described baffle plate gets out of the way the end of described test tube just, and described sample-containing turntable driven device drives and rotates; Rotary disk shutter, this rotary disk shutter is connected with the rotation axis of described tipping bucket by eccentric wheel, lifts guide arm rapidly in the moment that tipping bucket rotates.
Farmland of the present invention or runoff of sloping field water are monitored automatically and the feature of sampler also is, side at above-mentioned tipping bucket is fixed with a magnet, the stationkeeping of process has a tongue tube when tipping bucket overturns, this tongue tube links to each other with a counter, described magnet can make the closing of contact of described tongue tube when described tipping bucket overturns, and described counter number counting once.
Farmland of the present invention or runoff of sloping field water are monitored automatically and the feature of sampler also is, the test tube jack on the described sample-containing turntable is spiral form and distributes.
Farmland of the present invention or runoff of sloping field water are monitored automatically and the feature of sampler is that also described baffle plate is L shaped baffle plate.
Farmland of the present invention or runoff of sloping field water are monitored automatically and the feature of sampler is that also described rotary disk shutter is a lever construction.
Farmland of the present invention or runoff of sloping field water are monitored automatically and the feature of sampler also is, also comprise the tipping bucket carriage.
Farmland of the present invention or runoff of sloping field water are monitored automatically and the feature of sampler is that also described tipping bucket carriage is fixed on the side of casing, and the level height of its position and tipping bucket rotation axis is roughly the same.
Farmland of the present invention or runoff of sloping field water are monitored automatically and the feature of sampler is that also described tipping bucket carriage is shelved on the bottom of casing, and its height is roughly the same with the level height of tipping bucket rotation axis.
Farmland of the present invention or runoff of sloping field water are monitored automatically and the feature of sampler also is, are provided with osculum in the bottom of this casing.
Farmland of the present invention or runoff of sloping field water are monitored automatically and sampler has not only overcome the following shortcoming that exists in the prior art: the total amount that 1) can only measure runoff, and can not observe the runoff generating process, i.e. cumulative path flow, instantaneous through flow velocity and time relation curve; 2) can not collect the runoff water sample automatically, also just can't analyze the footpath flowable state of materials such as nutrient in the runoff water, agricultural chemicals, silt, i.e. cumulative flow vector, instantaneous loss speed and time relation curve can only analyze last total number of dropouts of these materials; When 3) run-off is big, spillover takes place easily, and under the underground water table condition with higher, the underground water phenomenon of osmosis takes place easily, excludes and plash can't permeate error with these; 4) can't eliminate influence of evaporation.And, can analyze the runoff process, collect the runoff water sample automatically.
Description of drawings
Fig. 1 is the synoptic diagram of each parts of automatic monitoring of farmland of the present invention or runoff of sloping field water and sampler.
Fig. 2 is the unitized construction synoptic diagram of automatic monitoring of farmland of the present invention or runoff of sloping field water and sampler.
Fig. 3 is the synoptic diagram of the sampling part of automatic monitoring of farmland of the present invention or runoff of sloping field water and sampler.
Fig. 4 is farmland of the present invention or the runoff of sloping field water distribution schematic diagram in the test tube hole on the sampling turntable of monitoring and sampler automatically.
Embodiment
It is following that monitoring and sampler are elaborated automatically to farmland of the present invention or runoff of sloping field water with reference to accompanying drawing.Fig. 1 is the synoptic diagram of each parts of automatic monitoring of farmland of the present invention or runoff of sloping field water and sampler, Fig. 2 is the unitized construction synoptic diagram of automatic monitoring of farmland of the present invention or runoff of sloping field water and sampler, Fig. 3 is farmland of the present invention or the runoff of sloping field water structural representation of the sampling part of monitoring and sampler automatically, and Fig. 4 is farmland of the present invention or the runoff of sloping field water distribution schematic diagram in the test tube hole on the sampling turntable of monitoring and sampler automatically.Among the figure, 4 is casing, is provided with tipping bucket rotation axis bracing frame 7 in these casing 4 two relative sides; 1 is the current fairing, is provided with water delivering orifice in the bottom of this current fairing 1, and the position at the position of this water delivering orifice and tipping bucket rotation axis 11 places is roughly on a vertical line; 2 is tipping bucket, and this tipping bucket has two small rooms, and the oxygon cube that these two small rooms are two symmetries is provided with tipping bucket rotation axis 11 in the bottom of two small rooms, and this tipping bucket rotation axis 11 is supported on the above-mentioned tipping bucket rotation axis bracing frame 7; 10 is sample-containing turntable, is provided with test tube jack 15 on the surface of sample-containing turntable, and the test tube jack is spiral form and distributes, and as shown in Figure 4, its top was a little more than the surface of this sample-containing turntable when test tube inserted this test tube jack; Drive unit 14, this drive unit 14 are used to drive described sample-containing turntable and rotate along a direction; Sampler 8, the runoff water that this sampler is rotated at tipping bucket 2, pouring moment is measured certain volume, be connected with flexible pipe 13 in the bottom of this sampler, the other end of this flexible pipe 13 is fixed on the positioning end of guide arm 17 described later, is used for runoff water is transported to guide arm test tube pointed; Guide arm 17, this guide arm 17 can vertically move up and down and can swing, one end of this guide arm is provided with baffle plate 19, this baffle plate is the L shape, when this guide arm is in the position that falls, can be hooked in above-mentioned test tube protrude in sample-containing turntable 10 the end and with the water delivering orifice of above-mentioned flexible pipe 13 be positioned at this test tube above, be in when lifting the position at this guide arm, described baffle plate 19 gets out of the way the end of described test tube just, and described sample-containing turntable 10 driven devices 14 drive and rotate; Rotary disk shutter 12, this rotary disk shutter 12 is a lever construction, this rotary disk shutter 12 is connected with the rotation axis 11 of described tipping bucket 2 by eccentric wheel 9, lifts guide arm rapidly in the moment that tipping bucket rotates.
Side at above-mentioned tipping bucket is fixed with a magnet 3, the stationkeeping of process has a tongue tube 5 when tipping bucket overturns, this tongue tube links to each other with a counter 6, and described magnet 3 can make the closing of contact of described tongue tube 5 when described tipping bucket overturns, and described counter 6 countings once.
Below tipping bucket 2, be provided with a tipping bucket bracing frame 18, in addition, also can be around the casing and the stationkeeping tipping bucket bracing frame of tipping bucket rotation axis approximate horizontal.
Bottom at casing 4 also is provided with osculum 16, so that the water that does not have sampled device to receive in the casing is discharged to the outside of casing.
Below only be an embodiment of automatic monitoring of farmland of the present invention or runoff of sloping field water and sampler; in the scope that does not change aim of the present invention, can carry out various variations; only otherwise exceed claim of the present invention institute restricted portion, all belong to the present invention's scope required for protection.
Claims (9)
1, a kind of farmland or runoff of sloping field water are monitored and sampler automatically, it is characterized in that, comprising: a casing, and two sides relative at this casing are provided with tipping bucket rotation axis bracing frame; One current fairing, this current fairing is shelved on the top of above-mentioned casing, is provided with water delivering orifice in the bottom of this current fairing, and the position of the position of this water delivering orifice and tipping bucket rotation axis is roughly on a vertical line; One tipping bucket, this tipping bucket have two small rooms, and the oxygon cube that these two small rooms are two symmetries is provided with the tipping bucket rotation axis in the bottom of two small rooms, and this tipping bucket rotation axis is supported on the above-mentioned tipping bucket rotation axis bracing frame; One sample-containing turntable is provided with the test tube jack on the surface of sample-containing turntable, and its top was a little more than the surface of this sample-containing turntable when test tube inserted this test tube jack; Drive unit, this drive unit are used to drive described sample-containing turntable and rotate along a direction; Sampler, this sampler is fixed on the below of tipping bucket, and tipping bucket when upset water wherein can flow into this sampler, is connected with flexible pipe in the bottom of this sampler, the other end of this flexible pipe is fixed on the positioning end of guide arm described later, is used for runoff water is transported to guide arm test tube pointed; Guide arm, this guide arm can vertically move up and down, one end of this guide arm is provided with baffle plate, this baffle plate when this guide arm is in the position that falls, can be hooked in above-mentioned test tube protrude in sample-containing turntable the end and with the water delivering orifice of above-mentioned flexible pipe be positioned at this test tube above, be in when lifting the position at this guide arm, described baffle plate gets out of the way the end of described test tube just, and described sample-containing turntable driven device drives and rotates; Rotary disk shutter, this rotary disk shutter is connected with the rotation axis of described tipping bucket by eccentric wheel, lifts guide arm rapidly in the moment that tipping bucket rotates.
2, farmland as claimed in claim 1 or runoff of sloping field water are monitored and sampler automatically, it is characterized in that, side at above-mentioned tipping bucket is fixed with a magnet, the stationkeeping of process has a tongue tube when tipping bucket overturns, this tongue tube links to each other with a counter, described magnet can make the closing of contact of described tongue tube when described tipping bucket overturns, and described rolling counters forward once.
3, farmland as claimed in claim 1 or runoff of sloping field water are monitored and sampler automatically, it is characterized in that, the test tube jack on the described sample-containing turntable is spiral form and distributes.
4, farmland as claimed in claim 1 or runoff of sloping field water are monitored and sampler automatically, it is characterized in that described baffle plate is L shaped baffle plate.
5, farmland as claimed in claim 1 or runoff of sloping field water are monitored and sampler automatically, it is characterized in that described rotary disk shutter is a lever construction.
6, farmland as claimed in claim 1 or runoff of sloping field water are monitored and sampler automatically, it is characterized in that, also comprise the tipping bucket carriage.
7, farmland as claimed in claim 6 or runoff of sloping field water are monitored and sampler automatically, it is characterized in that described tipping bucket carriage is fixed on the side of casing, and the level height of its position and tipping bucket rotation axis is roughly the same.
8, farmland as claimed in claim 6 or runoff of sloping field water are monitored and sampler automatically, it is characterized in that described tipping bucket carriage is shelved on the bottom of casing, and its height is roughly the same with the level height of tipping bucket rotation axis.
9, monitor automatically and sampler as any described farmland or the runoff of sloping field water of claim 1～claim 8, it is characterized in that, be provided with osculum in the bottom of this casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101652915A CN100557442C (en) | 2006-12-15 | 2006-12-15 | Farmland or runoff of sloping field water is monitoring and sampler automatically |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101652915A CN100557442C (en) | 2006-12-15 | 2006-12-15 | Farmland or runoff of sloping field water is monitoring and sampler automatically |
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| Publication Number | Publication Date |
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| CN101000335A true CN101000335A (en) | 2007-07-18 |
| CN100557442C CN100557442C (en) | 2009-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006101652915A Expired - Fee Related CN100557442C (en) | 2006-12-15 | 2006-12-15 | Farmland or runoff of sloping field water is monitoring and sampler automatically |
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| CN101915684A (en) * | 2010-08-12 | 2010-12-15 | 山东省农业科学院土壤肥料研究所 | Simple runoff collecting device and using method thereof |
| CN102253180A (en) * | 2011-04-26 | 2011-11-23 | 中国农业大学 | Remote real-time monitoring system for soil runoff |
| CN103983479A (en) * | 2014-05-30 | 2014-08-13 | 福建农林大学 | Drawer type portable slope runoff sampler and sampling method thereof |
| US20150241861A1 (en) * | 2011-12-21 | 2015-08-27 | Sakura Finetek U.S.A., Inc. | Reciprocating microtome drive system |
| CN105043815A (en) * | 2015-09-14 | 2015-11-11 | 华中农业大学 | Continuous collection and metering system for underground water |
| CN105277393A (en) * | 2015-11-09 | 2016-01-27 | 中国科学院测量与地球物理研究所 | Multi-parameter surface runoff sampling and measuring device |
| CN106546452A (en) * | 2016-10-08 | 2017-03-29 | 河海大学 | A kind of time-sharing automatic water sampler |
| CN107091760A (en) * | 2017-06-20 | 2017-08-25 | 中国水利水电科学研究院 | A kind of indoor soil tank experiment runoff and sediment continuous sampling measurement preserves system and method |
| CN107328608A (en) * | 2017-07-25 | 2017-11-07 | 郑州航空工业管理学院 | A kind of star wheel type sampled for the water surface can continuous automatic collector |
| CN107764593A (en) * | 2017-11-17 | 2018-03-06 | 河海大学 | A kind of continuous mixed sample harvester and its water sampling method |
| CN109443436A (en) * | 2018-11-26 | 2019-03-08 | 黑龙江省水利科学研究院 | Slope runoff overall process automated watch-keeping facility |
| CN109632380A (en) * | 2019-01-31 | 2019-04-16 | 安呈波 | A kind of water sampling unit |
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| CN112033760A (en) * | 2020-09-10 | 2020-12-04 | 中国农业科学院农业资源与农业区划研究所 | Integral sampling device and method |
| CN114577273A (en) * | 2022-05-07 | 2022-06-03 | 北京大学深圳研究生院 | Road surface runoff water flow water quality synchronous monitoring system with intelligent response function |
| CN117310111A (en) * | 2023-08-24 | 2023-12-29 | 中国水利水电科学研究院 | Automatic urban and rural non-point source pollution monitoring device and method |
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| US5821437A (en) * | 1997-01-03 | 1998-10-13 | Budin; Timothy M. | Environmental liquid collection apparatus |
| CN1804580B (en) * | 2005-12-05 | 2010-05-12 | 中国农业大学 | Apparatus and method for measuring line source inflow of soil infiltration performance |
| CN201000346Y (en) * | 2006-12-15 | 2008-01-02 | 中国农业科学院农业资源与农业区划研究所 | Device for automatically monitoring radial-flow water in farmland or sloping field and sampling apparatus thereof |
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2006
- 2006-12-15 CN CNB2006101652915A patent/CN100557442C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101915684B (en) * | 2010-08-12 | 2011-12-14 | 山东省农业科学院土壤肥料研究所 | Simple runoff collecting device and using method thereof |
| CN101915684A (en) * | 2010-08-12 | 2010-12-15 | 山东省农业科学院土壤肥料研究所 | Simple runoff collecting device and using method thereof |
| CN102253180A (en) * | 2011-04-26 | 2011-11-23 | 中国农业大学 | Remote real-time monitoring system for soil runoff |
| CN102253180B (en) * | 2011-04-26 | 2013-11-13 | 中国农业大学 | Remote real-time monitoring system for soil runoff |
| US9921137B2 (en) * | 2011-12-21 | 2018-03-20 | Sakura Finetek U.S.A., Inc. | Reciprocating microtome drive system |
| US20150241861A1 (en) * | 2011-12-21 | 2015-08-27 | Sakura Finetek U.S.A., Inc. | Reciprocating microtome drive system |
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| CN103983479A (en) * | 2014-05-30 | 2014-08-13 | 福建农林大学 | Drawer type portable slope runoff sampler and sampling method thereof |
| CN103983479B (en) * | 2014-05-30 | 2016-02-10 | 福建农林大学 | A kind of portable sheet flow sampler of drawer type and the method for sampling thereof |
| CN105043815A (en) * | 2015-09-14 | 2015-11-11 | 华中农业大学 | Continuous collection and metering system for underground water |
| CN105043815B (en) * | 2015-09-14 | 2017-08-25 | 华中农业大学 | Underground water is continuously collected and metering system |
| CN105277393A (en) * | 2015-11-09 | 2016-01-27 | 中国科学院测量与地球物理研究所 | Multi-parameter surface runoff sampling and measuring device |
| CN106546452B (en) * | 2016-10-08 | 2019-04-05 | 河海大学 | A kind of time-sharing automatic water sampler |
| CN106546452A (en) * | 2016-10-08 | 2017-03-29 | 河海大学 | A kind of time-sharing automatic water sampler |
| CN107091760A (en) * | 2017-06-20 | 2017-08-25 | 中国水利水电科学研究院 | A kind of indoor soil tank experiment runoff and sediment continuous sampling measurement preserves system and method |
| CN107091760B (en) * | 2017-06-20 | 2020-02-11 | 中国水利水电科学研究院 | Continuous sampling, measuring and storing system and method for runoff and sediment in indoor soil tank test |
| CN107328608A (en) * | 2017-07-25 | 2017-11-07 | 郑州航空工业管理学院 | A kind of star wheel type sampled for the water surface can continuous automatic collector |
| CN107764593A (en) * | 2017-11-17 | 2018-03-06 | 河海大学 | A kind of continuous mixed sample harvester and its water sampling method |
| CN107764593B (en) * | 2017-11-17 | 2024-04-09 | 南京方兴未艾农业科技有限公司 | Continuous mixed water sample collection device and water sample collection method thereof |
| CN109443436A (en) * | 2018-11-26 | 2019-03-08 | 黑龙江省水利科学研究院 | Slope runoff overall process automated watch-keeping facility |
| CN109632380B (en) * | 2019-01-31 | 2021-06-08 | 山东中衡环境检测有限公司 | Water sampling device |
| CN109632380A (en) * | 2019-01-31 | 2019-04-16 | 安呈波 | A kind of water sampling unit |
| CN111720582A (en) * | 2019-03-19 | 2020-09-29 | 姚福来 | Water separator for non-pressure small flow water inlet |
| CN110411786A (en) * | 2019-08-27 | 2019-11-05 | 四川农业大学 | A kind of device that can in time, sufficiently collect rainwash and interflow |
| CN110411786B (en) * | 2019-08-27 | 2024-04-16 | 四川农业大学 | Device capable of timely and fully collecting surface runoff and in-soil runoff |
| CN111879843A (en) * | 2020-07-15 | 2020-11-03 | 宁波华仪宁创智能科技有限公司 | Method for detecting drugs in hair |
| CN112033760A (en) * | 2020-09-10 | 2020-12-04 | 中国农业科学院农业资源与农业区划研究所 | Integral sampling device and method |
| CN112033759A (en) * | 2020-09-10 | 2020-12-04 | 中国农业科学院农业资源与农业区划研究所 | Metering sampling device and method |
| CN112033759B (en) * | 2020-09-10 | 2024-04-19 | 中国农业科学院农业资源与农业区划研究所 | Metering sampling device and method |
| CN112033760B (en) * | 2020-09-10 | 2024-04-19 | 中国农业科学院农业资源与农业区划研究所 | Integral sampling device and method |
| CN114577273A (en) * | 2022-05-07 | 2022-06-03 | 北京大学深圳研究生院 | Road surface runoff water flow water quality synchronous monitoring system with intelligent response function |
| CN117310111A (en) * | 2023-08-24 | 2023-12-29 | 中国水利水电科学研究院 | Automatic urban and rural non-point source pollution monitoring device and method |
| CN117310111B (en) * | 2023-08-24 | 2024-06-07 | 中国水利水电科学研究院 | Automatic urban and rural non-point source pollution monitoring device and method |
| CN117990427A (en) * | 2024-04-03 | 2024-05-07 | 成都市应顺行环保科技有限公司 | Sewage sampling device and sewage discharge system |
| CN117990427B (en) * | 2024-04-03 | 2024-06-07 | 成都市应顺行环保科技有限公司 | Sewage sampling device and sewage discharge system |
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| Publication number | Publication date |
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| CN100557442C (en) | 2009-11-04 |
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