常見例句雙語例句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.其主要由洗面盆，箱體，污水加壓裝置，單向閥，減壓閥，水龍頭等組成。ip.com 返回 one way pressure-reducing valve