知識貝殼
知識貝殼
所屬欄目：制革專業(yè)英語
After retanning,dyeing and fatliquoring,the leathers are horsed up overnight to allow excess liquor to drain off. Then the leathers are sammed and set out to reduce the water content further. At this stage,the leather still contains about 50%-60% water. T ......（本文共 12118 字 , 3 張圖） [閱讀本文] >>