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The test running of the small trackless equipments in tunneling at 753 Mine is described.
介绍小型无轨设备在规模较小的753矿巷道掘进中的试验应用情况。
youdao
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The test running of the small trackless equipments in tunneling at 753 Mine is described.
介绍小型无轨设备在规模较小的753矿巷道掘进中的试验应用情况。
youdao