exposed coalfield
常见例句
- Loose subsidence pillar is few to be exposed in Xishan coalfield, even in the whole country.
松散陷落柱这一地质现象在山西西山煤田乃至全国都很少揭露，对煤矿安全生产危害极大。 - Coal looking in exposed area in the Longyong coalfield is basically finished, thus coal looking in concealed area becomes the main thrust from now on.
龙永煤田暴露区找煤基本勘查完毕，隐伏区找煤成为今后工作的主攻方向。 返回 exposed coalfield