知识贝壳
知识贝壳
所属栏目：合成革专业英语
In dipping process,the impregnating solution is completely and uniformly distributedbetween the spaces of base by pressing and squeeze. The addition of PU makes the base formintegral structure from a macroscopical view,and the product has similar handle w ......（本文共 28412 字 ） [阅读本文] >>