他们操作的遥控装置可以改变截煤机的方向、位置和速度，这台德国产的截煤机可以沿着一道300米宽的煤面来回进行切割。

They work with remote control devices that change the direction, position and speed of a German-made cutting machine that slices back and forth along a 300-metre-wide coal face.

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如果你在太低的位置做了此切口的话，杆下面的切割标记就会暴露出来。

If you make the slice too low then the cut mark will be visible below the post.

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数以百计的传感器放置在自动化切割系统的各个位置，传回供维修人员参考的实时数据。

Several hundred sensors placed throughout an automated cutting system send back real-time data that maintenance personnel can act upon.

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