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The check valves shall be modular and shall seal to the main valve body by the use of an O-ring.
这种止回阀应该是模块化的,并且应该采用一个O形环密封在主阀体上。
youdao
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The check valves shall be modular and shall seal to the main valve body by the use of an O-ring.
这种止回阀应该是模块化的,并且应该采用一个O形环密封在主阀体上。
youdao