KR200447484Y1 - Sampler for collecting sample of tracer in many sites - Google Patents

Sampler for collecting sample of tracer in many sites Download PDF

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KR200447484Y1
KR200447484Y1 KR2020070019912U KR20070019912U KR200447484Y1 KR 200447484 Y1 KR200447484 Y1 KR 200447484Y1 KR 2020070019912 U KR2020070019912 U KR 2020070019912U KR 20070019912 U KR20070019912 U KR 20070019912U KR 200447484 Y1 KR200447484 Y1 KR 200447484Y1
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sampler
water
valve
sample
vacuum
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KR20090005889U (en
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문창덕
장성우
이지영
정경모
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한국수자원공사
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    • 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
    • G01N1/14—Suction devices, e.g. pumps; Ejector devices
    • 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
    • G01N1/16—Devices for withdrawing samples in the liquid or fluent state with provision for intake at several levels
    • 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
    • G01N33/18—Water

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  • Sampling And Sample Adjustment (AREA)

Abstract

본 고안은 다수의 채수공간이 서로 통하게 일렬로 연결된 샘플러 본체와, 각 채수공간마다 연결된 샘플링 라인, 샘플링 라인을 통한 추적자 샘플(예; F, Cl)의 흡입을 위해 진공압을 전달, 유지하는 진공챔버로 된 다지점 동시 샘플러에 관한 것으로, 추적자 샘플을 동일시간에 침전지 내의 많은 지점(예: 18개 지점 이상)에서 얻어, 공정 진단을 정확히 한다. The present invention is a vacuum for transmitting and maintaining a vacuum pressure for suction of a sampler body in which a plurality of collection spaces are connected in a line with each other, a sampling line connected to each collection space, and a tracer sample (eg, F, Cl) through the sampling line. A multi-point simultaneous sampler in a chamber, where tracer samples are taken at many points (eg, 18 or more) in the settling basin at the same time to ensure accurate process diagnostics.

샘플러, 정수장, 추적자, 공정, 진단 Sampler, water purification plant, tracer, process, diagnostics

Description

다지점 동시 샘플러{Sampler for collecting sample of tracer in many sites}Sampler for collecting sample of tracer in many sites}

본 고안은 정수장 내의 정수지, 침전지 등에서 공정진단을 위해 추적자(예: 불소 또는 염소)를 수집하는 샘플러(sampler)에 관한 것이다. The present invention relates to a sampler that collects tracers (eg fluorine or chlorine) for process diagnostics in water purification and sedimentation basins in water purification plants.

일반적으로 정수장 내의 정수지, 침전지 등에서는 여러 가지 정수약품(예: 응집제)으로 물을 정화하는데, 지(池) 내의 물의 흐름(flow)에 따라 정수물질이 균일하게 혼합되지 않아 정수가 원활히 되지 않는다. 그래서, 지(池) 내에 추적자를 투입하고, 얼마의 지점에서 채수한 물에 포함된 추적자(이하, '추적자 샘플')의 함유량으로부터 얻어진 정보(예: 물의 흐름, 물의 체류시간)를 사용하여 정수가 원활히 되게 해 왔다. In general, water purification and sedimentation basins in water purification plants purify water with various purified chemicals (eg, flocculants), and purified water is not uniformly mixed according to the flow of water in the pond. Thus, the tracer is introduced into the pond, and the purified water is extracted using information obtained from the content of the tracer (hereinafter referred to as the tracer sample) contained in the water taken at some point (for example, the flow of water and the residence time of the water). It has been smooth.

그런데, 종래는 동일시간에 단지 얼마의 지점(예: 3 ~ 4 지점)에서만 추적자 샘플이 얻어지므로 인해, 그로부터 얻어진 정보가 부정확한 문제점이 초래되어 왔다.However, in the past, tracer samples are obtained only at a certain point (e.g., 3 to 4 points) at the same time, resulting in inaccurate information obtained therefrom.

본 고안은 이러한 문제점을 해결하기 위하여 개발된 것으로, 추적자 샘플을 동일시간에 많은 지점에서 얻기 위한, 다지점 동시 샘플러를 제공하는데 그 목적이 있다.The present invention was developed to solve this problem, and an object thereof is to provide a multipoint simultaneous sampler for obtaining tracer samples at many points at the same time.

이러한 목적에 따른 본 고안의 다지점 동시 샘플러는For this purpose, the multi-point simultaneous sampler of the present invention

채수공간을 감싸며 상면의 상이한 단부에 유입구와 채수구가 구성된 채수통과, 상기 유입구에 채수관과 그 채수관에 연결된 샘플밸브, 상기 채수구에 진공압유입관과 그 진공압유입관에 연결된 삼방관으로 된 단위수집체 여러 개가 각 채수공간이 통하게 연결된 샘플러 본체, 상기 각 샘플밸브마다 연결된 샘플링 라인, 상기 샘플러본체의 일끝단에 위치된 삼방관과, 진공펌프가 연결된 진공챔버를 포함하여 이루어진 것을 특징으로 한다.A water collection tube surrounding the water collection space and having inlets and water inlets formed at different ends of the upper surface, a sample valve connected to the water collection pipe and the water collection pipe at the inlet, a vacuum pressure inlet pipe to the water inlet, and a triangular pipe connected to the vacuum pressure inlet pipe. A plurality of unit collectors consisting of a sampler body connected to each collection space, a sampling line connected to each sample valve, a three-way tube located at one end of the sampler body, and a vacuum chamber connected to the vacuum pump It is done.

상기 샘플러 본체의 타끝단에 위치된 삼방관에 연결된 진공해제용 밸브를 더 포함하여 이루어진 것을 특징으로 한다.And a vacuum release valve connected to the three-way tube located at the other end of the sampler body.

상기 진공압 유입관과 상기 삼방관 사이마다 연결된 역류방지밸브를 더 포함하여 이루어진 것을 특징으로 한다.It characterized in that it further comprises a non-return valve connected between the vacuum pressure inlet pipe and the three-way pipe.

상기 채수통 하면에 배출구, 그 배출구에 연결된 배출관, 그 배출관의 내부 공간을 개폐하는 드레인밸브로 된 샘플 드레인부를 더 포함하여 이루어진 것을 특징으로 한다.It characterized in that it further comprises a sample drain portion consisting of a drain valve for opening and closing the discharge port, the discharge pipe connected to the discharge port, the inner space of the discharge pipe on the lower surface of the sump.

상기 샘플밸브가 고정된 제1수평지지대, 상기 드레인밸브가 고정된 제2 수평지지대, 상기 샘플러 본체의 양측에 세워지고 상기 제1, 2 수평지지대가 고정 결합된 수직프레임으로 된 샘플러 운반부를 더 포함하여 이루어진 것을 특징으로 한다.The first horizontal support is fixed to the sample valve, the second horizontal support is fixed to the drain valve, the sampler carrying portion of the vertical frame is built on both sides of the sampler body and the first, second horizontal support is fixedly coupled Characterized in that made.

상기 샘플링 라인 하부마다 연결된 무게추를 더 포함하여 이루어진 것을 특징으로 한다.And a weight connected to each lower portion of the sampling line.

상기 샘플러 본체가 여러 개 구비되고, 1세트(set)씩 진공챔버에 연결된 것을 특징으로 한다. A plurality of sampler bodies are provided and are connected to the vacuum chamber one by one.

본 고안은 동일시간에 많은 지점(예: 18개 지점 이상)에서 얻은 추적자 샘플로 인해, 추적자 샘플에 대한 정확성과 신뢰성을 높여 공정 진단을 정확히 한다. The present invention provides accurate process diagnostics by increasing the accuracy and reliability of the tracer sample due to tracer samples obtained at many points (e.g. 18 points or more) at the same time.

이하, 첨부된 도면을 참조하여 본 고안을 설명한다.Hereinafter, the present invention will be described with reference to the accompanying drawings.

도 1a, 1b의 본 장치는 샘플러 본체(100), 샘플링 라인(L), 진공챔버(C)로 된 것이다. The apparatus of FIGS. 1A and 1B is composed of a sampler main body 100, a sampling line L, and a vacuum chamber C. As shown in FIG.

상기 샘플러 본체(100)는 단위수집체(UC) 여러 개가 각 채수공간이 서로 통하게 일렬로 연결된 구조이다. The sampler body 100 has a structure in which a plurality of unit collectors UC are connected in a line to each collection space.

상기 단위수집체(UC)는 채수통(101)과, 채수관(102), 샘플밸브(103), 진공압유입관(104), 삼방관(105)으로 된 것이다. 즉, 채수공간을 감싸며 상면의 서로 다른 단부에 유입구와 채수구가 구성된 직육면체 형의 채수통(101)과, 상면 유입구에 채수관(102)과 그 관(102)에 연결된 샘플밸브(103), 상면 채수구에 진공압유입 관(104)과 그 관(104)에 연결된 삼방관(105)으로 된 것이다. The unit collector (UC) is composed of a water collecting tank (101), a water collecting tube (102), a sample valve (103), a vacuum pressure inlet tube (104), and a three-way tube (105). That is, a cuboid basin 101 having an inlet and a water inlet at different ends of the upper surface and surrounding the water collecting space, and a sample valve 103 connected to the water intake tube 102 and the tube 102 at the upper inlet; It consists of a vacuum pressure inlet tube 104 and a three-way tube 105 connected to the tube 104 in the upper water collecting port.

상기 샘플링 라인(sampling line)(L)은 단위수집체들의 각 샘플밸브(103) 마다 연결되어 침전지 내 수중의 다(多) 지점에 설치된 것으로, 진공압으로 샘플(예: 침전지를 흐르는 물)을 흡입한다. The sampling line L is connected to each of the sample valves 103 of the unit collectors and installed at multiple points of the water in the sedimentation basin. The sampling line L is connected to a sample (for example, water flowing through the sedimentation basin) under vacuum pressure. Inhale.

상기 진공챔버(C)는 서로 다른 단부에 구성된 구멍 각각에 끼워진 호스를 통해 진공펌프(P)와, 샘플러 본체(100) 끝단에 위치된 삼방관(105-9)이 연결되어 채수공간과 통하는 구조인 것으로, 진공압을 채수공간 내로 공급, 유지되게 한다. The vacuum chamber (C) has a structure in which the vacuum pump (P) and the three-way tube (105-9) located at the end of the sampler main body (100) are connected to each other through a hose inserted into each hole formed at different ends. The vacuum pressure is supplied to and maintained in the water collecting space.

도 1a, 1b의 본 장치는 진공해제용 밸브(106)가 단위수집체들을 연결하는 삼방관 중, 끝단에 위치된 삼방관(105-1)에 더 연결 구성된 것으로, 샘플을 채수한 후 진공(vacuum)을 해제한다. 1A and 1B of the present invention, the vacuum release valve 106 is configured to be further connected to the three-way tube 105-1 located at the end of the three-way tube connecting the unit collectors, and the vacuum after collecting the sample (vacuum) ).

도 2의 본 장치는 채수통 하면에 배출구(109), 그 배출구(109)에 연결된 배출관(110), 배출관(110)의 내부 공간을 개폐하는 드레인밸브(111)로 된 샘플 드레인부(D)가 구성된 것으로, 채수통에 담긴 샘플을 드레인하여 채수병(112)에 담겨 지게 한다. In the present apparatus of FIG. 2, a sample drain portion D including a discharge port 109 on a lower surface of the water container, a discharge pipe 110 connected to the discharge port 109, and a drain valve 111 that opens and closes the internal space of the discharge pipe 110. To be configured, drain the sample contained in the sump to be contained in the sump (112).

도 2의 본 장치는 역류방지밸브(113)가 진공압 유입관(104)과 삼방관(105) 사이마다 연결 구성된 것으로, 채수된 샘플(예: 침전지로부터 유입된 물)이 주변의 다른 채수통으로 역류되는 것을 방지한다.In this apparatus of FIG. 2, the non-return valve 113 is configured to be connected between the vacuum inlet tube 104 and the three-way tube 105, and the collected sample (for example, water introduced from the settling basin) is transferred to the other basin around. To prevent backflow.

도 1a, 1b, 2의 본 장치는 샘플밸브(103)가 고정(예: 타이로 묶어 고정)된 제1수평지지대(107-1)와, 드레인밸브(111)가 고정된 제2 수평지지대(107-2), 샘플러 본체(100)의 양측에 세워지고 상기 제1, 2 수평지지대(107-1,2)가 고정 결합된 수직프레임(108)으로 된 샘플러 운반부(T)가 더 구성된 것으로, 본 장치를 들고 운반할 수 있게 한다.1A, 1B and 2, the apparatus includes a first horizontal support 107-1 to which the sample valve 103 is fixed (e.g., tie-fixed) and a second horizontal support to which the drain valve 111 is fixed ( 107-2), the sampler carrying part (T) is further composed of a vertical frame 108, which is built on both sides of the sampler body 100 and the first and second horizontal supports 107-1, 2 are fixedly coupled. Allow the unit to be carried and carried.

도 3의 본 장치는 퇴수밸브(114)가 진공챔버(C)의 하부 구멍에 연결 구성된 것으로, 채수통(101)의 채수공간을 넘쳐 진공챔버(C) 내로 유입되어 고인 불필요한 물이 배출되게 한다. 3, the discharge valve 114 is configured to be connected to the lower hole of the vacuum chamber (C), overflows the water collecting space of the sump (101) and flows into the vacuum chamber (C) to discharge the wasteful waste water. .

도 4의 본 장치는 무게추(예: 약 200g의 무게추)(115)가 샘플링 라인(L) 하부에 연결되어, 침전지 내의 수류(水流)에 의해 움직이는 샘플링 라인(L)을 고정시킨다. In the apparatus of FIG. 4, a weight (eg, a weight of about 200 g) 115 is connected to the lower portion of the sampling line L to fix the sampling line L moving by the water flow in the sedimentation basin.

추가로, 커넥터(connector, 예: 볼트식으로 장착되는 기역자 모양의 원터치 커넥터)(116)가 샘플링 라인(L)과 샘플밸브(103) 사이마다 연결 구성된 것으로, 샘플링 라인을 안정적으로 접속되게 한다.In addition, a connector (eg, a bolt-mounted one-touch connector) 116 is configured to be connected between the sampling line L and the sample valve 103 so as to stably connect the sampling line.

도 5의 본 장치는 다른 실시예로, 샘플러 본체(100-1, 100-2) 2개가 Y자형 연결관(117)으로 연결 구성되어 1세트(set)로 된 것으로, 샘플을 18개 이상의 지점에서 동시에 채수한다. 필요시, 샘플러 본체(100)를 더 부착하여 18개 이상의 지점 에서 샘플을 채수한다.In another embodiment of the present invention of Figure 5, two sampler main bodies (100-1, 100-2) is composed of a set consisting of a Y-shaped connecting pipe 117, one set (set), the sample is 18 or more points Simultaneously with If necessary, the sampler body 100 may be further attached to take samples at 18 or more points.

도 5의 본 장치는 진공펌프(P) 온에 의해 진공챔버(C)에서 발생한 진공압이 샘플밸브(103) 열림시, 침전지 내의 수중에 설치된 샘플링 라인(L) 내로 전달되어 물이 흡입되고, 채수통(101)의 채수공간을 채워 일정 수위에 도달한 경우, 그 샘플밸브(103)를 닫아 원하는 추적자 샘플(실제론, 추적자 샘플이 포함된 물)을 얻는다. In the present apparatus of FIG. 5, when the vacuum pressure generated in the vacuum chamber C is opened by the vacuum pump P on, the sample valve 103 is delivered to the sampling line L installed in the water in the sedimentation basin, and water is sucked in. When the water level of the water container 101 is filled to reach a certain level, the sample valve 103 is closed to obtain a desired tracer sample (actually, water containing the tracer sample).

그렇게 하여, 추적자 샘플이 얻어진 경우, 진공펌프(P)를 오프시켜 진공압 발생동작을 정지시킨 후, 진공해제용 밸브(106)를 열어 진공을 해제하고, 드레인밸브(111)를 열어 그 추적자 샘플을 채수병(112)에 담아 수집한다.Thus, when the tracer sample is obtained, after the vacuum pump P is turned off to stop the vacuum pressure generating operation, the vacuum release valve 106 is opened to release the vacuum, and the drain valve 111 is opened to open the tracer sample. To collect in a collection bottle 112.

한편, 본 장치가 설치된 현장과 샘플링 지점과의 거리가 먼 경우, 샘플링을 원하는 바로 그 시각에 그 지점을 흐르는 물을 채수하기 위해, 상기 과정에 따라 얻어진 첫 번째 물은 버리고, 상기 과정을 연속해서 한 번 더 수행하여 얻어진 두 번째 물을 채수병에 담는 것이 바람직하다.On the other hand, if the distance between the site where the device is installed and the sampling point is far, the first water obtained according to the above process is discarded to collect the water flowing at that point at the time when sampling is desired, and the above process is continuously performed. It is preferable to carry the second water obtained by one more time in the distillation bottle.

참고로, 본 장치는 배수가 용이한 곳, 여름철인 경우 그늘진 곳에 설치하고, 채수시간이 동일하도록, 샘플링 라인(L)들이 설치장소까지 가능한 한 같은 길이가 되도록 하는 것이 바람직하다. For reference, the device is installed in a place where the drainage is easy, in the shade in the summer, it is preferable that the sampling lines (L) to the same length as possible to the installation place, so that the water collection time is the same.

도 1a ~ 도 5의 본 고안에 사용된 각 구성요소의 제원은 다음과 같다.Specifications of each component used in the present invention of Figures 1a to 5 are as follows.

구성요소Component 제원Specifications 채수통Water can 50 ㅧ40 ㅧ100 (mm), 용량 200ml50 ㅧ 40 ㅧ 100 (mm), Capacity 200ml 채수관Water pipe 일자형 관Straight tube 개폐밸브Valve 샘플 밸브(Sample V/V)Sample Valve (Sample V / V) 진공압유입관Vacuum inlet pipe 일자형 관Straight tube 삼방관Trigeminal tube T자형 밸브T-shaped valve 샘플링 라인Sampling line 내경이 4mm인 플렉스 튜브(Flex Tube)Flex Tube with 4mm Inner Diameter 진공챔버Vacuum chamber Ψ150 ㅧ500, 용량23.6L, 두께 10mm의 투명아크릴Ψ150 ㅧ 500, Capacity 23.6L, Transparent Acrylic 10mm thick 진공펌프Vacuum pump 3/4마력의 진공펌프3/4 hp vacuum pump

도 1a는 본 고안의 다지점 동시 샘플러의 실시예의 구성을 보인 사시도       Figure 1a is a perspective view showing the configuration of an embodiment of a multi-point simultaneous sampler of the present invention

도 1b는 도 1a의 샘플러 본체의 실시예의 구성을 보인 배면도FIG. 1B is a rear view showing the configuration of an embodiment of the sampler body of FIG. 1A

도 2는 도 1a의 단위수집체의 실시예의 구성을 보인 측면도Figure 2 is a side view showing the configuration of an embodiment of a unit collector of Figure 1a

도 3은 도 1a의 진공챔버의 실시예의 구성을 보인 정면도Figure 3 is a front view showing the configuration of an embodiment of the vacuum chamber of Figure 1a

도 4는 본 고안의 무게추의 실시예의 구성을 보인 사시도Figure 4 is a perspective view showing the configuration of an embodiment of the weight of the present invention

도 5는 본 고안의 다지점 동시 샘플러의 다른 실시예의 구성을 보인 사시도5 is a perspective view showing the configuration of another embodiment of a multi-point simultaneous sampler of the present invention

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

100 : 샘플러 본체 C : 진공챔버100: sampler body C: vacuum chamber

P: 진공펌프 UC : 단위수집체 P: vacuum pump UC: unit collector

101 : 채수통 102 : 채수관 101: water collection container 102: water collection pipe

103 : 샘플밸브 104 : 진공압유입관 103: sample valve 104: vacuum pressure inlet pipe

105 : 삼방관 106 : 진공해제용 밸브 105: three-way tube 106: vacuum release valve

107-1 : 제1 수평지지대 107-2 : 제2 수평지지대107-1: 1st horizontal support 107-2: 2nd horizontal support

108 : 수평프레임 L : 샘플링 라인108: horizontal frame L: sampling line

109 : 배출구 110 : 배출관 109: discharge port 110: discharge pipe

112 : 채수병 113 : 역류방지밸브 112: collection bottle 113: backflow check valve

114 : 퇴수밸브 115 : 무게추 114: discharge valve 115: weight

116 : 커넥터 117 : Y자형 연결관116 connector 117: Y-shaped connector

Claims (8)

채수공간을 감싸며 상면의 상이한 단부에 유입구와 채수구가 구성된 채수통(101)과, 상기 유입구에 설치된 채수관(102), 상기 채수관(102)에 연결된 샘플밸브(103), 상기 채수구에 설치된 진공압유입관(104), 상기 진공압유입관(104)에 연결된 삼방관(105)으로 된 단위수집체(UC) 여러 개가 각 채수공간이 통하게 연결된 샘플러 본체(100)와; A water container 101 surrounding the water collecting space and having inlets and water inlets formed at different ends of the upper surface, a water collecting pipe 102 installed at the inlet, a sample valve 103 connected to the water collecting pipe 102, and the water collecting hole. A sampler body (100) having a plurality of unit collectors (UC) formed of three-way pipes 105 connected to the vacuum pressure inlet pipe 104 and the vacuum pressure inlet pipe 104 installed therethrough; 상기 진공압 유입관(104)과 상기 삼방관(105) 사이마다 연결된 역류방지밸브(113);A non-return valve 113 connected between the vacuum pressure inlet tube 104 and the three-way tube 105; 상기 각 샘플밸브(103)마다 연결되고, 그 하부에 무게추(115)가 연결되는 샘플링 라인(L);A sampling line (L) connected to each sample valve (103) and having a weight (115) connected to a lower portion thereof; 상기 샘플러 본체(100)의 일 끝단에 위치된 삼방관(105-9)에 연결되는 진공챔버(C);A vacuum chamber (C) connected to a three-way tube (105-9) located at one end of the sampler body (100); 상기 진공챔버(C)에 연결되는 진공펌프(P);A vacuum pump (P) connected to the vacuum chamber (C); 상기 샘플러 본체(100)의 타 끝단에 위치된 삼방관(105-1)에 연결된 진공해제용 밸브(106);A vacuum release valve 106 connected to a three-way tube 105-1 positioned at the other end of the sampler body 100; 상기 채수통(101) 하면에 형성된 배출구(109)와, 상기 배출구(109)에 연결된 배출관(110), 상기 배출관(110)의 내부 공간을 개폐하는 드레인밸브(111)로 된 샘플 드레인부(D); 및A sample drain part D including a discharge port 109 formed on a lower surface of the water container 101, a discharge pipe 110 connected to the discharge port 109, and a drain valve 111 that opens and closes an inner space of the discharge pipe 110. ); And 상기 샘플밸브(103)가 고정된 제1수평지지대(107-1), 상기 드레인밸브(111)가 고정된 제2 수평지지대(107-2), 상기 샘플러 본체(100)의 양측에 세워지고 상기 제1, 2 수평지지대(107-1,107-2)가 고정 결합된 수직프레임(108)으로 된 샘플러 운반부(T);The first horizontal support 107-1 to which the sample valve 103 is fixed, the second horizontal support 107-2 to which the drain valve 111 is fixed, and are erected on both sides of the sampler body 100 A sampler carrying part (T) comprising a vertical frame 108 to which first and second horizontal supports 107-1 and 107-2 are fixedly coupled; 를 포함하여 구성되는 것을 특징으로 하는 다지점 동시 샘플러.Multipoint simultaneous sampler, characterized in that configured to include. 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete
KR2020070019912U 2007-12-11 2007-12-11 Sampler for collecting sample of tracer in many sites KR200447484Y1 (en)

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