May be used in iced coal or lump coal with a certain thickness.

能用于对一定厚度的冻煤或大块煤采样。

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In order to attain the certain lump coal rate, the key is reasonable picks-lacing.

因而要达到一定的块煤率，关键是截齿的合理排列。

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It is a kind of feasible research means for optimization of blasting parameters for increasing lump coal rate.

从而为提高煤块率的参数优化提供了一种切实可行的研究方法。

youdao

Since it resembles a huge lump of coal, the craters on its surface have been named after coalfields.

ECONOMIST: Today we have naming of parts

Miners will march from the pit to a nearby cemetery where a lump of coal will be buried and two wreathes laid.

BBC: Maltby deep coal mine set to close

Still, there is good news for people whose credit scores are about as appealing as a lump of coal in a stocking on Christmas morning.

FORBES: Send Your Christmas List to FICO This Year