It also supplies liquid oxygen, liquid nitrogen, acetylene, carbon dioxide, hydrogen, propane, freon,liquid ammonia,and rare element gas.是什么意思_It also supplies liquid oxygen, liquid nitrogen, acetylene, carbon dioxide, hydrogen, propane, freon,liquid ammonia,and rare element gas.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句