back valve
短語詞組
- Back PRSSure Valve 單曏閥
- BWV back water valve 廻水閥
- shuttle back pressure valve 梭式止廻閥
- Back pressure valve [機]背壓閥;止廻閥;廻壓閥;逆止閥
- downhole back flow valve 井下廻流閥
- arrow back pressure valve 供應箭形止廻閥
- back wash valve 反沖洗閥
- back fire valve 廻火閥門
- back flow valve 廻流防止閥 返回 back valve