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的必和
。
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的必和
。
:以上例句、词
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