... prestressed element 预应力元件 prestressed ground anchor 预应力地锚 prestressed precast concrete pile 预应力预制混凝土桩 ...
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Permanent Prestressed Ground Anchor System 永久性预应力地锚桩基系统
permanent prestressed ground anchor systems 永久性预应力地锚桩基系统〔公共工程类别
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