知識貝殼
知識貝殼
所屬欄目：制革專業(yè)英語
On the following pages we will outline the items that indicate the properties of leather,regardless of the type of skin from which leather is made. These chemical and physical items can be determined or measured by the standard methods.2.1 Volatile Matter ......（本文共 10309 字 ） [閱讀本文] >>