Working medium inlet and exhaust non-return valves balance hole for Stirling engine is introduced.
对热气机工质进排气 单向阀 平衡孔作了简介.
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Single drainage pumps have the potential intrusion should set up a non-return valve.
单台水泵排水有可能发生倒灌时,应设止回阀.
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止回阀 ( 包括底阀 ) — 用于自动防止管道内的介质倒流.
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Water pumps at the end of the relevant type of valve is also a non-return valve.
水泵吸水关的底阀也属于止回阀类.
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