兑水 发表于 2009-9-12 20:03:58

ASTM B 499-1996 用磁性法测量磁性基底金属的非磁性镀层...

B499-96(2002) Standard Test Method for Measurement of Coating Thicknesses by the Magnetic Method: Nonmagnetic Coatings on Magnetic Basis Metals
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