coal-bed造句

1、Coal-bed methane accounts for about 2% of the world's natural-gas supply.
煤层气约占世界天然气供应的2%。

2、Discussion on the Ground Developing Scale of Coal-bed Methane (CBM)
试论煤层气地面开发的规模性

3、A NOVEL AIR/FUEL AUTOMATICALLY MIXING CONTROL UNIT OF COAL-BED GAS ICE
一种新颖的瓦斯气内燃机空燃自动混合控制装置

coal-bed翻译