- bituminous coal mine
- 烟煤: bituminous coal; soft coal; ...
- 矿: ore deposit
- 无烟煤矿: anthracite mine
- 烟煤: bituminous coal; soft coal; pit coal; bitumite; black coal; boghead; coaboghead
- 煤矿: coal mine; colliery; coalpit; bure◇煤矿安全 coal mine safety; 煤矿边界 marches; 煤矿测量 coal mine survey; 煤矿工人 coal miner; collier; 煤矿开采 coal mining; 煤矿企业 coal mine enterprise; colliery undertaking; 煤矿事故 coal mining accident; 煤矿挖掘机司机 grabman; 煤矿业 coal mining
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