Surface Roughness Specimen Set, Material Nickel, For Machining Method Face Turning, Number of Pieces 8, Roughness – Ra 16, 32, 63, 125, 250, 500, 1000, 2000 uin, Roughness – Rz 76.8, 128, 246, 500, 950, 1950, 4010, 7400 uin, Specimen Dimensions 128 mm x 52 mm
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