Model PG-8 Differential Pressure Meter is a compact differential pressure flow test kit with a self purging feature mounted in a rugged carrying case.是什么意思_Model PG-8 Differential Pressure Meter is a compact differential pressure flow test kit with a self purging feature mounted in a rugged carrying case.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句