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与"coal industry"相近的词条

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• coal gas
• Coal-gas maker
• coal heaver
• coal hod
• coal hole
• coal industry
• coal measures
• coal mine、coal-mine
• coal-mine irainage
• coal mine safety regulation
• coal miner
• coal-miner's lung、Coal miners' lung
• coal miner's pneumoconiosis、Coal miners' pneumoconiosis
• Coal-mining engineer
• coal oil
• coal oil mixture

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