16. Chemicals of interest to usability and quality

所属栏目：英汉烟草科技

Certain chemical index,for example,petroleum ether extract(PEE),is often used as an indicator of leaf desirability,although theexact components of this fraction are not completely defined,nor are itscombustion products. A few studies are listed herein ill ......（本文共 4001 字 ）     [阅读本文] >>


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