1. a cannel coal in which algal remains predominate and which is valuable as a source of paraffin oils and gas
boghead 片语
片语
boghead d coal泥煤
boghead cannel shale[地质]
boghead coal藻煤
soft coal烟煤
boghead mineral藻煤
cannel boghead烛藻煤
boghead d藻煤
bitumite烟煤
boghead shale藻油页巖
boghead-cannel沼油页巖
boghead 例句
英汉例句
the hydrocarbon generating assemblage can be divided into two types of cannel boghead deep lake mudstone and humic coal cannel coal shallow lake mudstone in this basin.