drain ball check
... drain away；流[排]尽 drain ball check；排放球阀 drain ball check spring；排放球阀弹簧 ...
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排放球阀弹簧 drain ball check spring
埋地放散排换球阀 BROEN
·2,447,543篇论文数据，部分数据来源于NoteExpress
该球阀阀前、阀后阀座都能密封，即所谓双向密封特性，利用自带的排放阀，阀体中腔可向外排放。
The ball valve before the valve can be closed after the valve seat, the so-called two-way sealing characteristics, the use of built-in discharge valve, the valve body cavity may be out emissions.
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