兑水 发表于 2009-9-7 09:47:40

ASTM A 523-1996 高压管型电缆线路用平端无缝与电阻焊钢管

A523-96(2001) Standard Specification for Plain End Seamless and Electric-Resistance-Welded Steel Pipe for High-Pressure Pipe-Type Cable Circuits
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