CX55B型挖掘机在赵楼矿井副井冻结表土段快速施工中的应用
CX55B형알굴궤재조루광정부정동결표토단쾌속시공중적응용
The Application of Excavator(CX55B)on Frozen Soil of Zhaolou Coal Mine Auxiliary Shaft
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