Materials and equipment for experiments(1) piece of white steel shaft size 1 inch thickness. (2) the sand paper (3) a rotating dish scrubber (4) hot air dryers. (5) cotton (6) the beaker (7) the substance Reagent: 3% Nital.
Materials and equipment trials (1) steel shaft white thickness of 1 inch (2) Paper (3) grinding rotating disc (4) Heat (5), cotton (6), beakers (7. ) Chemical Reagent include Nital 3%.
Materials and equipment in the experiment.(1) workpiece axle steel white size thickness 1 inches.(2) sandpaper.(3) polishing dish rotate.(4) hot air(5) cotton.(6) beaker.(7) of Reagent were Nital 3%.