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The non—prestressed steel bars in ppc beams endure alternate stress under the repeated service loading.
部分预应力混凝土梁中的非预应力钢筋在反复运行荷载作用下承受交变应力。
youdao
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The non—prestressed steel bars in ppc beams endure alternate stress under the repeated service loading.
部分预应力混凝土梁中的非预应力钢筋在反复运行荷载作用下承受交变应力。
youdao