... variety of axle, leaf springs, fork, valve, rocker, ball stud and other auto parts quenching. 3. All kinds of engine parts ... , etc.);5. All kinds of pliers, knives, scissors, axes, hammers and other hand tools quenchingDiathermy categories1. All kinds of bolt, nut ... blade welding; 3. All kinds of cutter, drill head, drill pipe, coal drill bits, drill bits and other mine parts of the wind welding Main ...