“trough washer”的概念、定义、翻译、参考文献-科学参考

单词	trough washer
释义	trough washer [`trȯf `wäsh·ǝr] ^{MINING ENGINEERING} A sloping wooden trough, 1¹/₂ to 2 feet wide, 8 to 12 feet long, and 1 foot deep (about 50 by 300 by 30 centimeters), open at the tail end but closed at the head end; it is used to float adhering clay or fine stuff from the coarser portions of an ore or coal.
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