... rough material 粗料、原料 round chute 圆形溜槽 round key 圆键 ...
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round chute
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以上为机器翻译结果，长、整句建议使用 人工翻译 。
The mid-19th century, experienced a mechanical transmission belt chute chute and round, becoming one of the major fine-grained non-ferrous metals ore sorting equipment.
19世纪中叶出现了机械传动的带式溜槽和圆形溜槽，成为当时细粒有色金属矿石的主要选别设备。
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Mr Dodson, 50, turned round and "saw brief sparks and saw the entanglement of the chute on the lines".
BBC: Cambridgeshire paraglider hits overhead electric cables
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