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大型采矿设备不能在窄台阶上操作。
Large mining equipment cannot be operated on narrow benches.
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介绍了小型无轨设备在采矿试验中的运行成本情况。
The operation cost of small scale trackless equipment in a mining test is described.
youdao
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介绍了小型无轨设备在采矿试验中的运行成本情况。
The operation cost of small scale trackless equipment in a mining test is described.
youdao