兑水 发表于 2009-9-14 20:23:42

ASTM B 797-1993粉末锻钢部件中表面指状氧化物穿透深度...

B797-93(2002)e1 Standard Test Method for Surface Finger Oxide Penetration Depth and Presence of Interparticle Oxide Networks in Powder Forged (P/F) Steel Parts
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