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.
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。
During conduct quantitative express to mechanics nature of work face coal, cutting strength is the most dependable comprehensive norm.
对工作面煤体的力学性质进行定量表征，抗截强度是最可靠的综合性指标。
The heart rate and energy metabolism rate of shearer operators and prop-setters during labour at coal face are measured at work site.
对机械化采煤工作面的采煤机司机和支柱工的劳动心率和能量代谢进行了现场实测。
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