以下为句子列表:
英文: When the municipal water supply network stops, the pressure of inlet disappears, first, second level check valves close, at the same time, because the conduit do not supply pressure to the lower cavity of diaphragm of drainage device, the valve flap of th
中文: 当市政管网停水,进口压力消失,一、二级止回阀关闭,同时由于导管不再向排污器膜片下腔供给压力,排污器的阀瓣在弹簧力和一、二级止回阀间介质压力作用下而打开,把两止回阀间回流的介质排放掉,这样起到防污隔断作用,即使第二级止回阀出现内漏,回流的介质也会经排污器排到外面,而不会流进主管网。
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