知识贝壳
知识贝壳
所属栏目：英汉烟草科技
Only 60%～65% of the weight of tobacco bought at auction finds itsway into shred in the final cigarette product. By far the largest by-product is the stem or mid-rib that held the leaf to the plant stalk. The stemmakes up 20%～25% of the leaf weight (Table ......（本文共 2648 字 , 2 张图） [阅读本文] >>