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叙述了北沼河铁矿凿岩台车掘进巷道的试验与应用情况。
The paper describes the test and application of jumbo rig in tunneling in Beiminghe Iron Mine.
youdao
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叙述了北沼河铁矿凿岩台车掘进巷道的试验与应用情况。
The paper describes the test and application of jumbo rig in tunneling in Beiminghe Iron Mine.
youdao