... pigsty timbering 空心垛式支架 advance timbering 前沿支撑 ground timbering 松散岩层支护 ...
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A new type self-walking advance timbering support set is adopted in longwall coal mining face of Halagou coal Mine, Shendong coal District by Shenhua Group co.
神华集团神东矿区哈拉沟煤矿在长壁工作面回风巷中采用了一种新型自移式超前支护支架组。
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