Flow rate of acetylene gas: 1.8-2.0 L/min, Flow rate of air: 13.5-15.0 L/min;是什么意思_Flow rate of acetylene gas: 1.8-2.0 L/min, Flow rate of air: 13.5-15.0 L/min;在线翻译_英语_读音_用法_例句