back valve
短語詞組
- Back PRSSure Valve 單向閥
- BWV back water valve 回水閥
- shuttle back pressure valve 梭式止回閥
- Back pressure valve [機]背壓閥;止回閥;回壓閥;逆止閥
- downhole back flow valve 井下回流閥
- arrow back pressure valve 供應(yīng)箭形止回閥
- back wash valve 反沖洗閥
- back fire valve 回火閥門
- back flow valve 回流防止閥 返回 back valve