Research of the Conversion Relations between Permeation Amount for Closed Water and Decompression Amount for Closed Air for the Airtightness Test of High Pressure Vessel是什么意思_Research of the Conversion Relations between Permeation Amount for Closed Water and Decompression Amount for Closed Air for the Airtightness Test of High Pressure Vessel在线翻译_英语_读音_用法_例句