短語(yǔ)詞組短語(yǔ)emergency oil relieve valve 緊急放油閥Pressure relieve valve 剪銷閥overload relieve valve 過(guò)載安全閥overloaded relieve valve 過(guò)載安全閥dual functional pressure relieve valve 雙功能泄壓閥safety valve relieve 安全閥排量 返回 relieve valve