Defend is difficult since its stability is bad, often bring face roof fall, the roof management is very difficult.

由于其稳定性差、维护困难，经常造成工作面顶板冒落，给顶板管理带来了很大困难。

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Defend is difficult since its stability is bad. It often brings face to roof fall. The roof management is very difficult.

由于其稳定性差、维护困难，经常造成工作面顶板冒落，给顶板管理带来了很大困难。

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The paper introduces a new way of roof management by analyzing the high temperature, fragile roof in the working surface in Qujiang which has obtained a better result.

针对曲江回采工作面温度高，顶板破碎等特征，采用“见四放一”方式管理顶板，取得了较好的成效。

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In Tennessee, a 47-year-old man died early Wednesday when high winds toppled a tree onto a roof in Nashville, the Tennessee Emergency Management Agency said.

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The report by Santia Asbestos Management Limited said asbestos in the roof void may have been blown around the building by the heating system.

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Mulvihill spent years haggling with the Ministry of Finance for licenses to operate institutional portfolios and mutual funds under one roof and make efficient use of Goldmans fund management and other resources.

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