It could also be because ozone in the buildings is sucking up squalene. This was the first study to look at skin-derived substances in indoor dust.

这可能是因为烹饪和其他活动也同样向室内环境中释放了胆固醇，也有可能是因为建筑物中的臭氧正在吸收鲨烯。

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Foreign material remover on each sucking pipe makes final guarantee for quality of cigarettes. Vibratory sieve and dust collection system provides the possibility of re-use of tobacco dust.

每个吸管上设有除杂机构在卷烟机前最后一次去除杂物，螺旋筛分功能及烟末分离收集系统更进一步确保了烟支的质量。

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