兑水 发表于 2009-9-6 07:37:56

ASTM A 291-2005减速器小齿轮齿轮心轴用碳素钢合金钢锻件

A291-03 Standard Specification for Steel Forgings, Carbon and Alloy, for Pinions, Gears and Shafts for Reduction Gears
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