drawoff valve 排液阀 ; 排出阀

carburettor drawoff 化油器放油

drawoff pump 排出泵

drawoff pipe 排油管

drawoff pot 取液槽

drawoff rate 出汽率

drawoff tank 抽水罐

drawoff godet 导丝盘

digested sludge drawoff 消化污泥排除管