post-tensioned prestressing concrete beam的意思|示意
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后张法预应力混凝土梁
post-tensioned prestressing concrete beam的网络常见释义
后张法预应力混凝土梁 post-tensioned prestressing 后张法预应力 post-tensioned prestressing concrete beam 后张法预应力混凝土梁 post-tensioned strand 后张钢线 ..