介绍了全国煤系硫铁矿的概况。

Brief accounts of pyrite mines across the country are given.

youdao

你说的是云浮硫铁矿四年级的李天朗？

You say that Yunfu Lee in the fourth grade pyrite fair?

youdao

对硫铁矿烧渣的碳还原过程进行研究。

The carbon reduction process of pyrite cinder was studied.

youdao

对硫铁矿烧渣的碳还原过程进行研究。

The carbon reduction process of pyrite cinder was studied.

youdao