prestressed concrete cylinder pressure pipe
...预应力钢筒混凝土管材(PCCP);聚羧酸系高性能减水剂;碱含量;粉煤灰 [gap=1302]Key words:prestressed concrete cylinder pressure pipe;polycarboxylates high performance water-reducing admixture;alkali content;fly a..
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prestressed concrete cylinder pressure pipe
预应力混凝土钢瓶压力管
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