... models are mainly used in the work environment is dirty,high temperature,corrosive and other harsh conditions. Heat treatmentautomoble, ... example:the plunger, rotor, reversing shaft in vavle,gear high-frequency hardening machine.all kinds of power tools gear shafts ... welding, such as word drill,horn drill welding.brass,copper,stainless steel pot and other materials hybrid welding.Melting/SmeltingMedium ...