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• coal outburst中文，coal outburst的意思，coal outburst翻译及用法
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• coal mining field中文，coal mining field的意思，coal mining field翻译及用法
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• coal pillar at working face中文，coal pillar at working face的意思，coal pillar at working face翻译及用法
• coal pillar mining中文，coal pillar mining的意思，coal pillar mining翻译及用法
• coalpit中文，coalpit的意思，coalpit翻译及用法
• coal pit中文，coal pit的意思，coal pit翻译及用法
• coal planer中文，coal planer的意思，coal planer翻译及用法
• coal powder burner中文，coal powder burner的意思，coal powder burner翻译及用法
• coal powder gasification中文，coal powder gasification的意思，coal powder gasification翻译及用法
• coal powder injection中文，coal powder injection的意思，coal powder injection翻译及用法
• coal powder preparation中文，coal powder preparation的意思，coal powder preparation翻译及用法
• coal preparation中文，coal preparation的意思，coal preparation翻译及用法