知识贝壳
知识贝壳
所属栏目：制革专业英语
Several members of the chemical family of aldehydes react on hide protein and prevent putrefaction. They are chiefly used for tanning white,washable leathers with the grain split or shaved off.3.1 Formaldehyde TannageFormaldehyde is a pungent gas,which is ......（本文共 8631 字 ） [阅读本文] >>