Said invention has good effect for preventing coal block from being broken, and its coal block breaking rate is low.

本发明防止煤块破碎效果好，破碎率低，且具有圆形立仓的防堵塞作用。

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Based on observation of coal cores it is concluded that the coal core consists of different forms in shape, controlled by coal block texture.

通过对煤心样品的观察研究得出，煤心具有不同的形状，此形状受煤体结构制约，区分不同煤心形状，能确定煤层中不同的煤体结构。

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In the process of its put into operation some problems were revealed, including coal block, difficult slag discharge, excessive output of fans and so on.

在投运过程中暴露了不少问题，如堵煤、排渣困难、风机出力过大等。

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The regulations also bar federal agencies from assessing emissions of the gases blamed for global warming on species and habitats, a tactic environmentalists have tried to use to block new coal-fired power plants.

CNN: Bush set to relax endangered species rules

At their rates of economic growth, disruptions in coal or natural gas supply could prove to be a major stumbling block to their economy.

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But Republicans still have the power to block climate legislation in the Senate, especially with some Democrats from coal and industrial states also ambivalent about cap-and-trade.

WSJ: Coming Next: The Act II Blueprint