兑水 发表于 2009-9-9 08:12:14

ASTM A 779-2005 预应力混凝土用应力消除未涂覆的密实七股...

A779/A779M-00 Standard Specification for Steel Strand, Seven-Wire, Uncoated, Compacted, Stress-Relieved for Prestressed Concrete
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