双排钮水手上衣 reefing jacket ; reefer
双向排水 double-slope drainage ; double drainage
双管海底排水口 twin submarine outfall
双排量涡壳式水轮机 double spiral turbine ; double-discharge spiral water turbine
双排量涡轮式水轮机 double-discharge spiral water turbine
双面排水条件 PTPB
双元排水纤颜科技 Anti-Puffiness System
双重排水 dual-drainage
双槽排水道 Double channel ditch
双面排水土层 Layer open
它具有双贝壳，分别由两根绳控制进行相对运动，还有用来排水的微型泵（他仍在寻找蛤足的最佳设计方案）。
It has a bivalve shell, two strings which move the valves against one another, and a small pump that expels water (he is still working on the best design for the foot).
传统的欧式门窗是木质门窗， 由80X80毫米实木方加工而成， 双铆榫结构， 设有通风排水系统。
Wood windows are the traditional windows in Europe, the wood frame is 80X80 mm with air circle and drainage system and double tenon structure.
防火油池应进行双池设计，两池中进油口和出水口不应同高或进口低于出口，这样才能形成虹吸排水贮油现象；
Dual fireproof oil reservoirs should be designed, and the oil inlet height should not be lower than that of the water outlet to siphon oil in and drain water off.
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