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Treating or finishing surfaces mechanically, with or without calibrating, primarily to resist wear or impact, e.g. smoothing or roughening turbine blades or bearings (treatment covered by a single other subclass, see the relevant subclass, e.g. B 24 C, C 21 D 7/00, C 22 F 1/00); Features of such surfaces not otherwise provided for, their treatment being unspecified |
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