单词	trommel
释义	trommel /ˈtrɒm(ə)l / noun Mining A rotating cylindrical sieve or screen used for washing and sorting pieces of ore or coal.By late August the scrubber plant was in operation; it consisted of a 4 x 20-foot rotating cylindrical trommel screen set at a slight incline.... The trommels are also ideally suited to other materials such as gypsum or co-mingled recycling. The highlight of the occasion was the demonstration of several new trommels and flatdeck screeners. Origin Late 19th century: from German, literally 'drum'.
随便看	protocloud protocluster protocneme protococcal defectiveness defector defeminise defeminize defence Defence Force defence in depth defenceless defencelessly defencelessness defenceman defence mechanism defend defendable defendant defender Defender of the Faith defenestrate defenestration defense defenseless

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