anthracite coal造句

1、Is a professional production of anthracite coal sales of the manufacturers.
是一家专业生产销售烟煤无烟煤的厂家。

2、But the anthracite coal increased the deal not very, the cold state strength descented is not much.
但无烟煤添加量不大时，冷态强度下降不多。

3、The major products is anthracite coal and bituminous coal, and so there.
煤炭产品主要是无烟煤与有烟煤等。