... of axle, leaf springs, fork, valve, rocker, ball stud and other auto parts quenching. 3. All kinds of engine parts ... (lathe, milling machine, planer, punch, etc.);5. All kinds of pliers, knives, scissors, axes, hammers and other hand tools quenchingDiathermy categories1. All kinds ... lamps, for instance, over voltage, over current, water shortage, and lack of any of the items above will cause the ...