兑水 发表于 2009-9-6 20:32:10

ASTM A 417-1993之字形方形正弦形家具用弹簧元件用冷拔钢丝

A417-93(2004) Standard Specification for Steel Wire, Cold-Drawn, for Zig-Zag, Square-Formed, and Sinuous-Type Upholstery Spring Units
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