Description
Machining method spark erosion (EDM). Ra: 16, 32, 63, 125, 250, 500, 1000, 2000?in. Rz: 100, 180, 288, 568, 988, 2048, 4200, 7840?in. For checking, identifying and specifying the roughness by symbol. Rust-proof, made of pure Nickel.
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