一个句子的结构!? Lower temperature carbonization(干馏) of lump coal at ca 700 ℃ primarily used for production of solid smokless fuel, gives a quantitatively and qualitatively different yield of solid, liquid, and gaseous products than does the high temperature process. 这个句子是比较煤的低温干馏和高温干馏产物的,但是,我觉得than前面少了一个成分。请高手指点一下! [ ]查看更多2个回答 . 3人已关注