兑水 发表于 2009-9-9 11:33:08

ASTM A 865-2006 钢管连接用黑色或镀锌焊接或无缝钢螺纹接头

A865-03 Standard Specification for Threaded Couplings, Steel, Black or Zinc-Coated (Galvanized) Welded or Seamless, for Use in Steel Pipe Joints
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