单词	ball mill
释义	ball mill noun : a pulverizing machine consisting of a rotating drum which contains pebbles or metal balls as the grinding implements Example Sentences Recent Examples on the Web Noisy tumblers known as ball mills operate almost continually in mining communities, often next to homes, grinding the ore along with mercury and water to extract the gold. National Geographic, 24 May 2016 For 15 years, Resti's family has operated a ball mill just outside the kitchen door. National Geographic, 24 May 2016 Word History First Known Use 1884, in the meaning defined above
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