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| Keywords: MetalFatigue 004.jpg Apparatus used at the National Bureau of Standards for polishing smooth fatigue test specimens Motor driven the equipment produces a highly uniform finish from specimen to specimen The polishing wheel consisting of a large number of metal spring leaves presses an abrasive belt against the specimen with uniform pressure The specimen itself is rotated at a constant rate and advances slowly over the abrasive surface during the polishing operation National Institute of Standards and Technology National Institute of Standards and Technology PD-USGov-NIST PD-USGov National Bureau of Standards National Institute of Standards and Technology | ||||
