The energy deficiency of China has become an issue which we have to pay attention to. Energy is the foundation and guarantee of the sustainable development of a country. The severe contradiction between the rapid economic development & huge consumer groups and energy structure, supply and demand drives us to follow the policy of saving energy and improving the energy utilization rate so as to realize the sustainable development. GJT30 Series bearing heaters, gear heaters and the like developed by Changzhou JunTai Machine Science and Technology Co., Ltd. are new energy-saving power frequency induction heaters.