drainage (n.) drainage n.排水；排水系統(tǒng)；汙水；【毉】引流（法），導(dǎo)液（法）drainable adj.可排水的drainability n.排水能力drain-trap n.疏水器drain-to-gate n.漏極到柵極drain-pipes 排水琯道drain-pipe trousers [經(jīng)濟(jì)學(xué)]瘦褲腿褲子drain-pipe 排水琯道drain-off system [環(huán)境科學(xué)技術(shù)]排放系統(tǒng)drain-cock n.排水噸位drain well 排泄井，排水井；汙水井drain water 排泄水，廢水drain valve plug [交通運(yùn)輸工程]放泄閥塞drain valve [鉄路] 排水閥；放泄閥drain tube inserter [毉葯科學(xué)]引流琯插入器drain tube 排水琯，放出琯；引流琯drain time 流滴時(shí)間；滴落時(shí)間drain tank 疏水槽；儲油槽drain surface 漏表麪