知识贝壳
知识贝壳
所属栏目：英汉烟草科技
In addition to its physical function of containing the combustibles,the cigarette paper plays a controlling role in the combustion process.Most papers are based on flax or linen fiber and contain 20%-30% ofcalcium carbonate. This white pigment serves to c ......（本文共 2570 字 ） [阅读本文] >>