知识贝壳
知识贝壳
所属栏目：制革专业英语
Vegetable substances have been used for tanning since ancient times. The properties of vegetable-tanned leather include low extensibility,good strength,shape retention,storage of moisture,embossing properties,and polishing properties of the grain and of t ......（本文共 8298 字 ） [阅读本文] >>