... 4. High Quality & Reliability 5. Self Adapting Frequency tools hardening induction quenching machine Heat Treatment like annealing, normalizing, ... quenching, tempering.1. Hardware and tools, such as plier, wrench, hammer, ax, screwing tools and shear (orchard shear).2. ... metal products.IGBT (SIEMENS) technology, high conversion efficiency Energy saving 15%-30% , compared to SCR/KGPS technologyMuch ...