名词
中文翻译：煤炭开采机械
同义词：
['coal mining machinery', 'coalextraction machinery']
例句：
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1. Thenew coal mining machinery has greatly improved theefficiency of the mine operation.
新型的煤炭开采机械大大提高了矿井作业的效率。
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2. Thecoal mining machinery is essential for extractingcoal from underground.
煤炭开采机械是提取地下煤炭所必需的。
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3. The coal mining machinery isused to break down the coal into smallerpieces for transportation.
煤炭开采机械用于将煤炭破碎成小块以便运输。