Kai Xuan-check Cast Steel Valve in the fully open state, almost unimpeded fluid pressure, the pressure drop through the valve relatively small.是什么意思_Kai Xuan-check Cast Steel Valve in the fully open state, almost unimpeded fluid pressure, the pressure drop through the valve relatively small.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句