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浮运架梁技术
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浮运架梁技术
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理学
近代施工技术
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floating frame beam technology
浮运架梁技术
利用浮力架梁,不需在桥孔内组立临时辅助设施,梁体借助自然水位的升降或抽灌水的沉浮,将钢梁架设到桥位上,同样也可将旧梁自桥位换下来的一种技术。
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precious metal powder materials
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Precious Mirror
Precious Mirror for Health
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preciousness of life
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