Open needle valve "A" high side, then open needle valve "B" low side one turn, loosen hose at test cock No.

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Open needle valve "A" high side, then open needle valve "B" low side one turn, loosen hose at test cock No. 4 to remove air.

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With the use of boilers, 1681, has emerged lever hammer safety valve.

隨著鍋爐的使用亚洲资源一区二区在线观看，1681年又出現(xiàn)了杠桿重錘式安全閥国产片免费。1769年瓦特蒸汽機出現(xiàn)以前，旋塞閥和止回閥一直是最主要的閥門精品国产国语对白AⅤ。

Placed outside the valve, must be covered with linoleum or Tarpaulins like rain, dust-proof materials.

放置室外的閥門一区二区欧美亚洲，旋塞閥必需蓋打油氈或大雨布之類防雨、防塵物品国产一区精品自拍。

Quick-Change Valve Plug- Removable groove pin allows quick, easy valve plug replacement.

快速更換旋塞閥欧美另类熟妇性爱，可移動槽引腳可快速，容易閥芯更換欧美日韩二区视频。

09 Plug Cock, plug opening and closing parts rotated around its axis valve.

1-09 旋塞閥 Cock欧美性爱国产，plug 啟閉件電站閥門繞其軸線旋轉(zhuǎn)的閥門。

Waste plastic box to protect ball Waste plastic box to protect ball Northwest Oilfield Branch Ministry of oil and gas distribution gas transmission team round of the gate, the station has all of the 34 ball on the plastic protective cover is installed, even if the waste plastic boxes are used, but also to protect the ball.

Waste plastic box to protect ball 日本AAA片；是由上海賽泰泵閥有限公司提供的閥門新聞亚洲人14个视频，中文譯文僅供參考(上海賽泰泵閥有限公司還生產(chǎn)電動執(zhí)行器特殊閥門電站閥門平衡閥水力控制閥及襯氟旋塞閥，襯氟截止閥毛片无码高清，高溫高壓電磁閥2018日本高清色视频，氧氣截止閥，微型電磁閥日韩高清在线一区二区三区，歡迎您的選購在线日韩日本国产亚洲。)廢舊塑料盒保護球閥西北油田分公司油氣運銷部輸氣隊輪臺門站近日在34個球閥上全部安裝了塑料防護罩，既使廢塑料盒得到利用色一级A片视频在线播放网站大全，又保護了球閥欧美大胆A级视频69。

Valve Plug Stability- Rugged cage guiding provides increased valve plug stability, which reduces vibration and mechanical noise.

旋塞閥穩(wěn)定性堅固的籠指導提供了更強的閥芯穩(wěn)定，從而降低機械振動和噪音欧美性爱乱。

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Plug valves and ball valves are more applicable to this purpose, therefore, mostly used for the shunt valve is selected in one of these valves.

旋塞閥和球閥較適用于這一目的亚洲精品456在线播放第1集，因此黄色视频的网址免费，大部分用于換向分流的閥門都選取這類閥門中的一種。