The problem needed to be solved is that the primary material of traditional cigarette of background technique contains nicotine toxin and the tar is generally not extracted before using.

所要解决的问题就是背景技术存在的传统香 烟的主料含有尼古丁毒素，使用前一般不进行焦油提取。

youdao

The problem needed to be solved is that the primary material of traditional cigarette of background technique contains nicotine toxin and the tar is generally not extracted before using.

所要解决的问题就是背景技术存在的传统香 烟的主料含有尼古丁毒素，使用前一般不进行焦油提取。

youdao