one way pressure-reducing valve
常见例句
- 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。
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