| | 煤烟 smoke from burning coal soot | | 煤烟污染 smoke pollution | | 煤焦油 coal tar | | 煤球 eggette | | 煤田 coal field | | 煤田开发 coal field development | | 煤田构造 coalfield structure | | 煤田钻井 coal drilling | | 煤病 sooty mould | | 煤的用途何止那一些 The uses of coal are by no m... | | 煤矸石 gangue | | 煤矸石砖 colliery wastes brick | | 煤矿 coal mine | | 煤矿业 coal mining | | 煤矿事故 coal mining accident | | 煤矿企业 coal mine enterprise | | 煤矿安全 coal mine safety | | 煤矿工人 coal miner | | 煤矿床 coal deposit | | 煤矿开采 coal mining | | 煤矿挖掘机司机 grabman | | 煤矿测量 coal mine survey | | 煤矿边界 marches | | 煤码头 coal wharf | | 煤砖 briquet |
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