Mohammed takes me to a farm across the road, where he and his neighbor lift a stone slab to reveal an earthen chamber six feet deep and wide: an emergency underground food store.

默罕默德带我来到路对面的一个农场，在这儿，他和他邻居抬起一块石板，露出了一个泥做的6英尺见方的地下室，这是一个紧急地下食物仓库。

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The lift force due to the action of jet flow is analysed and the conditions of improving the safety factors of apron slab are presented.

分析了使护坦板块失稳的上举力的成因； 指出了增加护坦板稳定性的条件。

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This paper introduces the main contents and their background of the national code for design, construction and acceptance of lift-slab structures.

本文介绍国家标准《升板建筑结构设计施工及验收规范》(报批稿)的主要内容及编制情况。

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