return pipeline 中文意思是什麼
return pipeline
解釋
回淋線-
Once the pressure of the main network returns to normal, the valve flap of drainage outlet closes under pressure, first, second level check valves open, the main network return to supply water to branch pipeline
一旦主管網壓力恢復正常，排污口閥瓣受壓關閉，一二級止回閥打開，主管路恢復向支管供水。
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