... 滑动刨煤机 slideplough 硬煤刨煤机 hard plough 振动式刨煤机 oscillating plough ...
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hard-coal plough [矿业] 硬煤层刨煤机
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They textbook contains more explanatory material than models and is therefore hard to plough through.
这本教科书中说说明性材料多于范文，所以难以阅读。
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Whenever snow is hard and packed, we should plough it.
BBC: Groups name big freeze priorities ahead of Cobra talks
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