ASTM D7091-2012 黑色金属上无磁性覆层和有色金属上不传导覆层干膜厚度的无损测量规程
ASTM D7091-2012 Standard Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and Nonmagnetic,Nonconductive Coatings Applied to Non-Ferrous Metals
测试周期：9-12个工作日