名词
中文翻译：粗粒磨煤机组
同义词：
['coarse-mill', 'roughing mill', 'roughing mill assembly']
例句：
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1. The roughing mill is used to remove impurities from raw coal before it is fed into the main mill.
粗粒磨煤机用于在将原煤送入主磨之前，去除原煤中的杂质。
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2. The roughing mill is responsible for removing fines and pulverized materials from the raw coal.
粗粒磨煤机负责从原煤中去除细粉和粉末状物质。
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3.The roughing mill plays a crucial role in the overall efficiency of the coal preparation process.
粗粒磨煤机在煤炭准备过程的整体效率中起着至关重要的作用。