... Comparing with electronic tube,it save40-60% energy, comparing with thyristor,it save 20% energy; it save60% water. induction quenching ... one time hardening.5. hardening equipment should request energy-efficient.zhongxing the features of shaft hardening equipment.1. ... kinds of track spiker.Hardening features:1.adopt IGBT, energy saving2.steady performance, protective meansure complete. no troubles ...