"This place was hell," says Tom Levy cheerfully as he stands over an open pit filled with ancient coal-black slag.
“这个地方以前几乎是个地狱，”托马斯·莱维风趣的说到，他站在一处被古老的墨黑炉渣填满的露天矿坑中。
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Since the system can display with image the ash and slag distribution in the ash-pit under the boiler in a real-time manner, it helps people effectively control the operation of the ash system.