In the process of acetylene manufacture making use of cracking of natural gas,the obtained waste gas contains a small amount of 1-3-butadiyne.是什么意思_In the process of acetylene manufacture making use of cracking of natural gas,the obtained waste gas contains a small amount of 1-3-butadiyne.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句