The dog is leaping at him.
这他跳过去。
The dog is leaping at him.
这他跳过去。
Coal mine rockbolt shoring current situation,necessity and significance having discussed rockbolt shoring parameter optimization design combining with leaping forward.
结合跃进煤矿锚杆支护现状,探讨了锚杆支护参数优化设计必要性和重要性。
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