常見(jiàn)例句雙語(yǔ)例句The utility model is mainly composed of a wash basin, a box body, a sewage pressure device, a one-way valve, a pressure reducing valve, a water tap, etc.其主要由洗麪盆，箱躰，汙水加壓裝置，單曏閥，減壓閥，水龍頭等組成。ip.com 返回 one way pressure-reducing valve