When the pressure go to the pipe, valve control will rise ,the valve routeway will open .There is no perch , sealed cushion and orientation seat in the valve .是什么意思_When the pressure go to the pipe, valve control will rise ,the valve routeway will open .There is no perch , sealed cushion and orientation seat in the valve .在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句