JPH0893009A - Water saving tap - Google Patents
Water saving tapInfo
- Publication number
- JPH0893009A JPH0893009A JP22926994A JP22926994A JPH0893009A JP H0893009 A JPH0893009 A JP H0893009A JP 22926994 A JP22926994 A JP 22926994A JP 22926994 A JP22926994 A JP 22926994A JP H0893009 A JPH0893009 A JP H0893009A
- Authority
- JP
- Japan
- Prior art keywords
- water
- tap
- water supply
- cylinder
- amount
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 238000012856 packing Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 210000000078 claw Anatomy 0.000 description 3
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Domestic Plumbing Installations (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は給水部に設けられる節
水栓に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water saving plug provided in a water supply section.
【０００２】[0002]
【従来の技術】図２０は従来の節水栓（実開昭６２−１
９６２６１号公報）を示す断面図である。図に示すよう
に、有底の円筒体１９の底部に孔２０が設けられてい
る。2. Description of the Prior Art FIG.
FIG. 9 is a cross-sectional view showing (Japanese Patent No. 96261). As shown in the figure, a hole 20 is provided at the bottom of the bottomed cylindrical body 19.
【０００３】図２０に示した節水栓を図２１に示すよう
に給水栓２１の基部に設けたときには、給水栓２１部の
流路抵抗が大きくなるから、節水栓が設けられていない
場合と比較して、給水栓２１自体の開度が同一であって
も、給水栓２１の給水口から給水される給水量を減少さ
せることができる。When the water-saving tap shown in FIG. 20 is provided at the base of the water-hydraulic tap 21 as shown in FIG. 21, the flow path resistance of the water-hydrating tap 21 becomes large, so that it is compared with the case where the water-saving tap is not provided. Then, even if the opening degree of the water tap 21 itself is the same, the amount of water supplied from the water inlet of the water tap 21 can be reduced.
【０００４】[0004]
【発明が解決しようとする課題】しかし、このような節
水栓においては、給水量の減少量を調節することができ
ない。However, in such a water saving tap, it is not possible to adjust the amount of decrease in the amount of water supply.
【０００５】この発明は上述の課題を解決するためにな
されたもので、給水量の減少量を調節することができる
節水栓を提供することを目的とする。The present invention has been made to solve the above problems, and an object of the present invention is to provide a water-saving faucet capable of adjusting the amount of decrease in water supply.
【０００６】[0006]
【課題を解決するための手段】この目的を達成するた
め、この発明においては、給水部に設けられる節水栓に
おいて、側部穴を有しかつ内面に雌ネジを有する筒状体
と、中央穴を有しかつ外周面に上記雌ネジと螺合する雄
ネジを有する移動体とを設ける。In order to achieve this object, according to the present invention, in a water saving plug provided in a water supply portion, a cylindrical body having a side hole and an internal thread on an inner surface, and a central hole are provided. And a moving body having an external thread on its outer peripheral surface that is screwed with the female thread.
【０００７】この場合、上記側部穴を上記筒状体の中心
線方向に複数設ける。In this case, a plurality of side holes are provided in the center line direction of the cylindrical body.
【０００８】[0008]
【作用】この節水栓においては、筒状体に対して移動体
を回転すると、移動体が筒状体に対して軸方向に移動す
るから、側部穴の開口面積が変化する。In this water saving plug, when the moving body is rotated with respect to the tubular body, the moving body moves in the axial direction with respect to the tubular body, so that the opening area of the side hole changes.
【０００９】また、側部穴を筒状体の中心線方向に複数
設けたときには、給水栓の給水口から給水される給水量
の減少量が円筒体に対する移動体の移動量とほぼ比例す
る。Further, when a plurality of side holes are provided in the center line direction of the cylindrical body, the amount of decrease in the amount of water supplied from the water supply port of the water tap is substantially proportional to the amount of movement of the movable body with respect to the cylindrical body.
【００１０】[0010]
【実施例】図１はこの発明に係る節水栓を示す斜視図、
図２は図１に示した節水栓を示す断面図、図３は図１に
示した節水栓の円筒体を示す斜視図、図４は図１に示し
た節水栓の円筒体を示す断面図、図５は図１に示した節
水栓の移動体を示す斜視図、図６は図１に示した節水栓
の移動体を示す断面図である。図に示すように、有底の
円筒体１の端部にカラー２が設けられ、円筒体１の側部
に四角形状の側部穴３が設けられ、円筒体１の内面のカ
ラー２側に雌ネジ４が設けられ、移動体５の中央部に中
央穴７が設けられ、移動体５の外周面に雌ネジ４と螺合
する雄ネジ６が設けられ、移動体５の端部に一対の凹部
８が設けられ、移動体５の雄ネジ６部に目盛９が設けら
れている。1 is a perspective view showing a water saving tap according to the present invention,
2 is a cross-sectional view showing the water-saving faucet shown in FIG. 1, FIG. 3 is a perspective view showing a cylindrical body of the water-saving faucet shown in FIG. 1, and FIG. 4 is a cross-sectional view showing a cylindrical body of the water-saving faucet shown in FIG. 5 is a perspective view showing a moving body of the water-saving tap shown in FIG. 1, and FIG. 6 is a sectional view showing the moving body of the water-saving tap shown in FIG. As shown in the figure, a collar 2 is provided at the end of the bottomed cylinder 1, a square side hole 3 is provided at the side of the cylinder 1, and a collar 2 on the inner surface of the cylinder 1 is provided. A female screw 4 is provided, a central hole 7 is provided in the central portion of the moving body 5, and a male screw 6 that engages with the female screw 4 is provided on the outer peripheral surface of the moving body 5. The concave portion 8 is provided, and the scale 9 is provided on the male screw 6 portion of the moving body 5.
【００１１】図７は図１に示した節水栓の使用状態を示
す図、図８は図７に示したパッキンを示す図である。図
に示すように、樹脂等からなりかつ内面中央部に溝１４
を有するパッキン１３がカラー２に取り付けられ、給水
管１０の端部と給水栓１１の端部とによってパッキン１
３が挟まれ、袋ナット１２が給水栓１１の端部に設けら
れた雄ネジと螺合している。FIG. 7 is a view showing a usage state of the water saving tap shown in FIG. 1, and FIG. 8 is a view showing the packing shown in FIG. As shown in the figure, it is made of resin and has a groove 14 at the center of the inner surface.
A packing 13 having a seal is attached to the collar 2, and the packing 1 is formed by the end of the water supply pipe 10 and the end of the water tap 11.
3, the cap nut 12 is screwed with a male screw provided at the end of the water tap 11.
【００１２】この節水栓においては、凹部８にドライバ
（図示せず）の先端部を挿入して、円筒体１に対して移
動体５を回転すると、移動体５が円筒体１に対して軸方
向に移動するから、側部穴３の開口面積が変化するの
で、節水栓部の流路抵抗が変化するため、給水栓１１の
給水口から給水される給水量の減少量を調節することが
できる。また、移動体５の雄ネジ６部に目盛９を設けて
いるから、目盛９によって複数の節水栓における側部穴
３の開口面積をほぼ等しくすることができるから、複数
の給水栓１１の給水口から給水される給水量の減少量を
ほぼ等しくすることができる。In this water-saving tap, when the tip of a driver (not shown) is inserted into the recess 8 and the movable body 5 is rotated with respect to the cylindrical body 1, the movable body 5 is rotated relative to the cylindrical body 1. Since it moves in the direction, the opening area of the side hole 3 changes, and thus the flow path resistance of the water-saving tap changes. Therefore, it is possible to adjust the amount of decrease in the amount of water supplied from the water inlet of the water tap 11. it can. Further, since the scale 9 is provided on the male screw 6 portion of the moving body 5, the scale 9 can make the opening areas of the side holes 3 in the plurality of water-saving taps substantially equal to each other. The amount of decrease in the amount of water supplied from the mouth can be made almost equal.
【００１３】図９は図１に示した節水栓の他の使用状態
を示す図である。図７に示した使用状態においては、給
水管１０内に円筒体１を位置させたが、図９に示すよう
に、給水栓１１内に円筒体１を位置させてもよい。そし
て、円筒体１に対する移動体５の位置が同一であって
も、図７、図９に示した使用状態における節水栓部の流
路抵抗は異なるから、給水栓１１の給水口から給水され
る給水量の減少量を変化させることができる。FIG. 9 is a view showing another usage state of the water-saving tap shown in FIG. In the use state shown in FIG. 7, the cylindrical body 1 is located in the water supply pipe 10, but the cylindrical body 1 may be located in the water supply plug 11 as shown in FIG. Then, even if the position of the moving body 5 with respect to the cylindrical body 1 is the same, since the flow path resistance of the water-saving tap portion in the use state shown in FIGS. 7 and 9 is different, water is supplied from the water supply port of the water tap 11. The amount of decrease in water supply can be changed.
【００１４】図１０は図１に示した節水栓の他の使用状
態を示す図、図１１は図１０に示した増径カラーを示す
図、図１２は図１０に示したパッキンを示す図である。
図に示すように、カラー２部に増径カラー１７が設けら
れ、カラー２、増径カラー１７に樹脂等からなるパッキ
ン１８が取り付けられている。FIG. 10 is a view showing another state of use of the water-saving tap shown in FIG. 1, FIG. 11 is a view showing the diameter-increasing collar shown in FIG. 10, and FIG. 12 is a view showing the packing shown in FIG. is there.
As shown in the drawing, a collar 2 is provided with a diameter increasing collar 17, and a packing 18 made of resin or the like is attached to the collar 2 and the diameter increasing collar 17.
【００１５】このように、節水栓に増径カラー１７、パ
ッキン１８を取り付ければ、給水管の径、給水栓の端部
の径が大きいときにも使用することができる。As described above, if the diameter-increasing collar 17 and the packing 18 are attached to the water-saving tap, it can be used even when the diameter of the water supply pipe and the diameter of the end portion of the water supply tap are large.
【００１６】図１３はこの発明に係る他の節水栓の円筒
体を示す図である。図に示すように、円筒体１の外周面
の側部穴３部に目盛１５が設けられている。FIG. 13 is a view showing a cylindrical body of another water saving tap according to the present invention. As shown in the figure, a scale 15 is provided in the side hole 3 portion of the outer peripheral surface of the cylindrical body 1.
【００１７】この節水栓においては、目盛１５によって
複数の節水栓における側部穴３の開口面積をほぼ等しく
することができるから、複数の給水栓１１の給水口から
給水される給水量の減少量をほぼ等しくすることができ
る。In this water-saving tap, since the opening areas of the side holes 3 in the plurality of water-saving taps can be made substantially equal by the scales 15, the amount of decrease in the amount of water supplied from the water supply ports of the plurality of water-hydrants 11 can be reduced. Can be approximately equal.
【００１８】図１４はこの発明に係る他の節水栓の円筒
体を示す図である。図に示すように、円筒体１の側部に
円弧と直線とから形成された形状の側部穴１６が設けら
れている。FIG. 14 is a view showing a cylindrical body of another water saving tap according to the present invention. As shown in the drawing, a side hole 16 having a shape formed by an arc and a straight line is provided on the side of the cylindrical body 1.
【００１９】図１５はこの発明に係る他の節水栓を示す
斜視図、図１６は図１５に示した節水栓の円筒体を示す
断面図である。図に示すように、内径が約７ｍｍの円筒
体１にそれぞれ一対の円形の側部穴２２ａ〜２２ｄが設
けられ、側部穴２２ａ〜２２ｄは円筒体１の中心線方向
すなわち図１６紙面左右方向に並んでおり、側部穴２２
ａ〜２２ｄの径はそれぞれ１．８ｍｍ、１．６ｍｍ、
１．７ｍｍ、２．４ｍｍである。また、円筒体１の内面
には雌ネジ２３が設けられ、雌ネジ２３は側部穴２２ａ
が設けられている部分には設けられていない。FIG. 15 is a perspective view showing another water saving plug according to the present invention, and FIG. 16 is a sectional view showing a cylindrical body of the water saving plug shown in FIG. As shown in the figure, a pair of circular side holes 22a to 22d are provided in the cylindrical body 1 having an inner diameter of about 7 mm, and the side holes 22a to 22d are in the center line direction of the cylindrical body 1, that is, in the left-right direction on the paper surface of FIG. Side holes 22
The diameters of a to 22d are 1.8 mm, 1.6 mm,
It is 1.7 mm and 2.4 mm. A female screw 23 is provided on the inner surface of the cylindrical body 1, and the female screw 23 has a side hole 22a.
Is not provided in the part where is provided.
【００２０】この節水栓においては、側部穴２２ａ〜２
２ｄは円筒体１の中心線方向に並んで設けられているか
ら、給水栓１１の給水口から給水される給水量の減少量
が円筒体１に対する移動体５の移動量とほぼ比例するの
で、容易に給水量の減少量を調整することができる。ま
た、移動体５の大部分が円筒体１から突出した状態で、
円筒体１を給水栓１１に挿入して節水栓を取り付けたと
きには、水の力によって徐々に移動体５が円筒体１の内
部に入っていき、給水量の減少量が徐々に多くなるすな
わち給水量が徐々に少なくなるから、使用者に抵抗感を
与えることなく節水することができる。この場合、雌ネ
ジ２３は側部穴２２ａが設けられている部分には設けら
れていないから、移動体５によって側部穴２２ａが塞が
れることはないので、給水栓１１の給水口から給水され
る給水量が零になることはない。In this water-saving tap, the side holes 22a-2
Since 2d are arranged side by side in the direction of the center line of the cylinder 1, the amount of decrease in the amount of water supplied from the water supply port of the water tap 11 is approximately proportional to the amount of movement of the moving body 5 with respect to the cylinder 1. The amount of water supply reduction can be easily adjusted. Also, with most of the moving body 5 protruding from the cylindrical body 1,
When the cylinder 1 is inserted into the water tap 11 and the water-saving tap is attached, the moving body 5 gradually enters the inside of the cylinder 1 due to the force of water, and the amount of decrease in the amount of water supply gradually increases. Since the amount is gradually reduced, water can be saved without giving the user a feeling of resistance. In this case, since the female screw 23 is not provided in the portion where the side hole 22a is provided, the side hole 22a is not blocked by the moving body 5, so that the water is supplied from the water supply port of the water tap 11. The amount of water supplied is never zero.
【００２１】図１７は図１５に示した節水栓の使用状態
を示す断面図、図１８は図１７に示されたネジストッパ
を示す正面図、図１９は図１８に示したネジストッパを
示す側面図である。図に示すように、給水管１０の端部
と給水栓１１の端部とによってカラー２が挟まれ、袋ナ
ット１２が給水栓１１の端部に設けられた雄ネジと螺合
し、給水管１０の端部とカラー２との間に平面部２５に
複数の爪２６が設けられかつステンレス鋼からなるネジ
ストッパ２４が挟まれている。FIG. 17 is a sectional view showing a usage state of the water-saving tap shown in FIG. 15, FIG. 18 is a front view showing the screw stopper shown in FIG. 17, and FIG. 19 is a side view showing the screw stopper shown in FIG. is there. As shown in the figure, the collar 2 is sandwiched between the end portion of the water supply pipe 10 and the end portion of the water supply tap 11, and the cap nut 12 is screwed with the male screw provided at the end portion of the water supply tap 11 to form the water supply pipe. A plurality of claws 26 are provided on the flat surface portion 25 between the end portion of 10 and the collar 2, and the screw stopper 24 made of stainless steel is sandwiched.
【００２２】このような使用状態とするには、まず円筒
体１に対する移動体５の位置を決め、爪２６をカラー２
の方向に向けてネジストッパ２４を移動体５の円筒体１
からの突出部に係合し、カラー２および平面部２５を給
水管１０の端部と給水栓１１の端部とで挟んだ状態で、
袋ナット１２を給水栓１１の端部に設けられた雄ネジと
螺合する。すると、平面部２５がカラー２に押し付けら
れ、爪２６が変形して雄ネジ６のネジ溝に食い込む。こ
のため、水の力が移動体５に作用したとしても、移動体
５が円筒体１に対して移動することはないから、給水量
の減少量が変化することがない。In order to obtain such a state of use, first, the position of the moving body 5 with respect to the cylindrical body 1 is determined, and the claw 26 is fixed to the collar 2.
The screw stopper 24 toward the direction of
With the collar 2 and the flat surface portion 25 sandwiched between the end portion of the water supply pipe 10 and the end portion of the water tap 11,
The cap nut 12 is screwed into a male screw provided at the end of the water tap 11. Then, the flat surface portion 25 is pressed against the collar 2, and the claw 26 is deformed and bites into the thread groove of the male screw 6. Therefore, even if the force of water acts on the moving body 5, since the moving body 5 does not move with respect to the cylindrical body 1, the amount of decrease in the water supply amount does not change.
【００２３】なお、上述実施例においては、筒状体とし
て円筒体１を用いたが、筒状体として多角筒体等を用い
てもよい。In the above embodiment, the cylindrical body 1 is used as the cylindrical body, but a polygonal cylindrical body or the like may be used as the cylindrical body.
【００２４】[0024]
【発明の効果】以上説明したように、この発明に係る節
水栓においては、筒状体に対して移動体を回転すると、
側部穴の開口面積が変化するから、給水量の減少量を調
節することができる。As described above, in the water-saving tap according to the present invention, when the moving body is rotated with respect to the tubular body,
Since the opening area of the side hole changes, the amount of decrease in the amount of water supply can be adjusted.
【００２５】また、側部穴を筒状体の中心線方向に複数
設けたときには、給水栓の給水口から給水される給水量
の減少量が円筒体に対する移動体の移動量とほぼ比例す
るから、容易に給水量の減少量を調整することができ
る。Further, when a plurality of side holes are provided in the direction of the center line of the cylindrical body, the amount of decrease in the amount of water supplied from the water supply port of the water faucet is approximately proportional to the amount of movement of the moving body with respect to the cylindrical body. , The amount of water supply reduction can be easily adjusted.
【図１】図１はこの発明に係る節水栓を示す斜視図であ
る。FIG. 1 is a perspective view showing a water saving tap according to the present invention.
【図２】図１に示した節水栓を示す断面図である。FIG. 2 is a cross-sectional view showing the water-saving plug shown in FIG.
【図３】図１に示した節水栓の円筒体を示す斜視図であ
る。3 is a perspective view showing a cylindrical body of the water saving plug shown in FIG. 1. FIG.
【図４】図１に示した節水栓の円筒体を示す断面図であ
る。FIG. 4 is a cross-sectional view showing a cylindrical body of the water-saving plug shown in FIG.
【図５】図１に示した節水栓の移動体を示す斜視図であ
る。5 is a perspective view showing a moving body of the water saving plug shown in FIG. 1. FIG.
【図６】図１に示した節水栓の移動体を示す断面図であ
る。FIG. 6 is a cross-sectional view showing a moving body of the water saving plug shown in FIG.
【図７】図１に示した節水栓の使用状態を示す図であ
る。FIG. 7 is a diagram showing a usage state of the water-saving plug shown in FIG. 1.
【図８】図７に示したパッキンを示す図である。FIG. 8 is a diagram showing the packing shown in FIG. 7.
【図９】図１に示した節水栓の他の使用状態を示す図で
ある。FIG. 9 is a diagram showing another usage state of the water-saving tap shown in FIG.
【図１０】図１に示した節水栓の他の使用状態を示す図
である。FIG. 10 is a view showing another usage state of the water-saving plug shown in FIG.
【図１１】図１０に示した増径カラーを示す図である。11 is a diagram showing the diameter-increasing collar shown in FIG.
【図１２】図１０に示したパッキンを示す図である。12 is a diagram showing the packing shown in FIG.
【図１３】この発明に係る他の節水栓の円筒体を示す図
である。FIG. 13 is a view showing a cylindrical body of another water saving tap according to the present invention.
【図１４】この発明に係る他の節水栓の円筒体を示す図
である。FIG. 14 is a view showing a cylindrical body of another water saving tap according to the present invention.
【図１５】この発明に係る他の節水栓を示す斜視図であ
る。FIG. 15 is a perspective view showing another water saving plug according to the present invention.
【図１６】図１５に示した節水栓の円筒体を示す断面図
である。16 is a cross-sectional view showing a cylindrical body of the water-saving plug shown in FIG.
【図１７】図１５に示した節水栓の使用状態を示す断面
図である。FIG. 17 is a cross-sectional view showing a usage state of the water-saving plug shown in FIG.
【図１８】図１７に示されたネジストッパを示す正面図
である。FIG. 18 is a front view showing the screw stopper shown in FIG. 17.
【図１９】図１８に示したネジストッパを示す側面図で
ある。FIG. 19 is a side view showing the screw stopper shown in FIG. 18.
【図２０】従来の節水栓を示す断面図である。FIG. 20 is a cross-sectional view showing a conventional water saving plug.
【図２１】図２０に示した節水栓の使用状態を示す図で
ある。FIG. 21 is a diagram showing a usage state of the water-saving plug shown in FIG. 20.
１…円筒体 ３…側部穴 ４…雌ネジ ５…移動体 ６…雄ネジ ７…中央穴 ２２ａ…側部穴 ２２ｂ…側部穴 ２２ｃ…側部穴 ２２ｄ…側部穴 ２３…雌ネジ DESCRIPTION OF SYMBOLS 1 ... Cylindrical body 3 ... Side hole 4 ... Female screw 5 ... Moving body 6 ... Male screw 7 ... Central hole 22a ... Side hole 22b ... Side hole 22c ... Side hole 22d ... Side hole 23 ... Female screw
Claims (2)
穴を有しかつ内面に雌ネジを有する筒状体と、中央穴を
有しかつ外周面に上記雌ネジと螺合する雄ネジを有する
移動体とを具備することを特徴とする節水栓。1. A water-saving plug provided in a water supply part, wherein a cylindrical body having a side hole and an internal thread on an inner surface, and a male screw having a central hole and being screwed with the internal thread on an outer peripheral surface. And a moving body having a water-saving plug.
数設けたことを特徴とする請求項１に記載の節水栓。2. The water saving plug according to claim 1, wherein a plurality of the side holes are provided in a direction of a center line of the cylindrical body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22926994A JPH0893009A (en) | 1994-09-26 | 1994-09-26 | Water saving tap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22926994A JPH0893009A (en) | 1994-09-26 | 1994-09-26 | Water saving tap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0893009A true JPH0893009A (en) | 1996-04-09 |
Family
ID=16889471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22926994A Pending JPH0893009A (en) | 1994-09-26 | 1994-09-26 | Water saving tap |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0893009A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005314960A (en) * | 2004-04-28 | 2005-11-10 | Yoshiki Tatemori | Water saving member and water saving device making use thereof |
| CN106718365A (en) * | 2017-01-23 | 2017-05-31 | 恒生命科学仪器（昆山）有限公司 | A kind of ventilation device with TCH test channel |
-
1994
- 1994-09-26 JP JP22926994A patent/JPH0893009A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005314960A (en) * | 2004-04-28 | 2005-11-10 | Yoshiki Tatemori | Water saving member and water saving device making use thereof |
| CN106718365A (en) * | 2017-01-23 | 2017-05-31 | 恒生命科学仪器（昆山）有限公司 | A kind of ventilation device with TCH test channel |
| CN106718365B (en) * | 2017-01-23 | 2022-04-05 | 一恒生命科学仪器(昆山)有限公司 | Ventilation adjusting device with test channel |
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