3. Stems and other wastes Stems
工業(yè)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 張圖）     [閱讀本文] >>