石头大概是指煤，煤化工后可以产生化纤

来源: 老生常谈12 于 2017-03-29 20:14:12 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.