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1. Oxford American Dictionary

   tumbling barrel

   • IPA[ˌtəmb(ə)liNG ˈberəl]

   美式

   • n.
     a revolving device containing an abrasive substance, in which castings, gemstones, or other hard objects can be cleaned and polished by friction.

   • noun: tumbling barrel, plural noun: tumbling barrels

2. • 相關詞

   tumbling bay

   • n.
     an outfall from a river, reservoir, or canal, or the pool into which this flows.

   Oxford Dictionary

3. • 更多解釋

   tumbling barrel

   • n.
     a revolving device containing an abrasive substance, in which castings, gemstones, or other ...

   Oxford Dictionary