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ACI 423.3R-2017 無(wú)粘結(jié)預(yù)應(yīng)力混凝土構(gòu)件推薦規(guī)程 Recommendations For Concrete Members Prestressed With Single-...2023-07-19

GB/T 19685-2017預(yù)應(yīng)力鋼筒混凝土管Prestressed concrete cylinder pipe2023-04-15