“烟煤”的英语？

在全国所有的工人中,可能烟煤矿工不满的理由最充分.Of all the workers in the country bituminous miners probably had best grounds for discontent.烟煤一般被视作一种质地均匀一致的产品.Bituminous coal is often treated as a consistent and homogeneous product.是一家专业生产销售烟...