This paper analyses the causes of common cracks of reinforced concrete Structure, and gives the crack controlling principle, measures, handling methods of the harmful cracks.

分析了钢筋混凝土结构裂缝的产生原因，提出了裂缝控制的原则、措施及有害裂缝的处理方法。

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From the Angle of concrete construction, this article analyzed the cause, prevention of non-structural crack in concrete construction, and treatment method with epoxy grout for the harmful cracks.

本文简述了混凝土结构裂缝现状，分析了其产生原因，提出了混凝土结构裂缝的预防以及控制策略。

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The magnetic field-which shields us from harmful radiation-is developing a mysterious crack.

的磁场，这盾牌我们免受有害辐射，正在研制一种神秘的裂缝。

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Heroin, crack cocaine and methamphetamine were the most harmful drugs to individuals, the study says, while alcohol, heroin and crack cocaine were the most harmful to others.

CNN: STORY HIGHLIGHTS

London, England (CNN) -- Alcohol ranks "most harmful" among a list of 20 drugs, beating out crack and heroin when assessed for its potential harm to the individual imbibing and harm to others, according to study results released by a British medical journal.

CNN: STORY HIGHLIGHTS