ASTM A881 A881M-2002 Prestressed Concrete Railroad Ties - 仪器网,仪器信息网,计量论坛

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ASTM A881 A881M-2002 Prestressed Concrete Railroad Ties

  powderpaint · 2007-12-27 17:41 · 48262 次点击

ASTMA881A881M-2002
SteelWire,Deformed,Stress-RelievedorLowRelaxationfor
PrestressedConcreteRailroadTies

 标准手册, a881, a881m, prestressed, concrete, railroad

1 条回复

donaclove 2008-05-01 10:23: 這份資料確實非常好
有利於工作上需要

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