Surface Roughness Specimen Set, Material Nickel, For Machining Method Criss Cross, Flat Lapping, Parallel, Number of Pieces 8, Roughness – Ra 1, 2, 4, 8 uin, Roughness – Rz 1, 2, 4, 8 uin 1, 2, 4, 8 uin, Specimen Dimensions 128 mm x 52 mm
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