... Applications :Quenching: hammer, pliers, measuring tools, screwdrivers, picks, knives, scissors, gardening tools and other tools of the quenching, shaft, ... , steering rod , camshaft, etc.), bicycle parts, machine tools, guides, farm machinery parts, textile machinery parts (Th ... duration rate, can work 24 hours continuously 3) Digital phase-locked technology, realize the automatic frequency tracking4 ...