Check the pressure-gauge on the FRL air input unit (Filter Pressure Reducer Lubricator), which should remain within a range of 6 to 8 bar.是什么意思_Check the pressure-gauge on the FRL air input unit (Filter Pressure Reducer Lubricator), which should remain within a range of 6 to 8 bar.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句