知识贝壳
知识贝壳
所属栏目：英汉烟草科技
The evolution of cigarette filters can be traced through severalstages. The first step was probably the use of special tipping papers tokeep the cigarette from adhering to a moist lip. These papers were usually printed to simulate a wooden or cork appeara ......（本文共 5926 字 , 14 张图） [阅读本文] >>