1·The conventional material in these filters has long been a bituminous coal base, whereas one of Siemens' new products uses coconut shells.
这些过滤器的常规材料一直以来都使用烟煤做滤材，而西门子的一种新产品使用椰壳做滤材。
2·General bituminous coal mining; Motor freight.
一般烟煤开采；汽车货运。
3·The analysis results of bituminous coal and lean coal are same, but there are some differences with analysis results of anthracite coal in low temperature.
烟煤与贫煤的分析结果一致，而无烟煤的分析结果在低温时存在差异。
4·Bituminous coal is often treated as a consistent and homogeneous product.
烟煤一般被视作一种质地均匀一致的产品。
5·Wumuchang Area is a local bituminous coal district metamorphized by sub-volcanics in Yiming Coal Field which is located in northeast China.
五牧场区是内蒙东部伊敏褐煤盆地中一个因次火山侵入作用形成的局部的烟煤区。