7 Degreasing

所属栏目:制革专业英语

Sheepskins and some of other small skins contain large amounts of natural fat. As already mentioned,sheepskins contain up to 30% fat which has to be removed. Excessive amounts of fatty substances in the skin may interfere with uniform penetration of tanni ......(本文共 10677 字 )     [阅读本文] >>


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