参观人员穿上工作服和安全帽，乘坐吱嘎直响的升降梯下降到地面300米以下的产煤面。
Visitors can dress up in jumpsuits and hard hats and descend in a creaking elevator to the coalface 300 metres below the surface.
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.
使用焦炭，一方面煤产量增加，同时也增加了现代社会大气中二氧化碳的含量。
The rise of coal, from which coke is produced, began, and so did the modern rise of carbon dioxide in the atmosphere.
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