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大 中
小 發表於 2015-12-21 07:45 PM (第 3020 天) 顯示全部帖子
Petroleum fraction properties
Why petroleum fractions of lower relative molecular masses
(1) are lighter in color
(2) are more flammable
than those of greater relative molecular masses?
[ 本帖最後由 Light2012 於 2015-12-21 11:22 PM 編輯 ]
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