单词：polyvinyl iodide
[化] 聚碘乙烯
单词：polyvinyl iodide 相关文章
Recycling Plastics When plastic containers are recycled, they are first cleaned, then ground into tiny pellets and put into a flotation tank. This separates out the various plastic resins from other waste material. Once they are separated out, the pl
发表于:2018-12-27 / 阅读(138) / 评论(0)
英语时差8，16
英语时差8，16