为何桥梁跨越河流通常是斜交
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![为何桥梁跨越河流通常是斜交](/uploads/image/z/5585205-21-5.jpg?t=%E4%B8%BA%E4%BD%95%E6%A1%A5%E6%A2%81%E8%B7%A8%E8%B6%8A%E6%B2%B3%E6%B5%81%E9%80%9A%E5%B8%B8%E6%98%AF%E6%96%9C%E4%BA%A4)
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