APP 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） [閱讀本文] >>
說明： 本文檔由創(chuàng)作者上傳發(fā)布，版權(quán)歸屬創(chuàng)作者。若內(nèi)容存在侵權(quán)，請點(diǎn)擊