The use of straight chain heptanes is more and more extensive, but it is more difficult to manufacture.

正庚烷用途越来越广泛，但制取较为困难。

youdao

The use of straight chain heptanes is more and more extensive, but it is more difficult to manufacture.

正庚烷用途越来越广泛，但制取较为困难。

youdao