the weakness of light source
the weakness of light source
光源的弱点
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The source of capacity weakness to prevent crack and leakage for block exterior wall of light concrete is found out through analysis of characters of light concrete block.
介绍混凝土砌块外墙裂缝产生常见部位和一般特征，分析裂缝产生原因，从设计、施工、监理方面阐述防裂抗渗措施。
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