... Industry, electronics and electrical industry, Metal industry and Packaging industry, Cable&wire, Foundry&metal .Tube&pipe, ect. The ... treatment, parts surface hardening, tempering, annealing, etc.B: metal brazing, high-frequency brazing, pan bottom brazing, tool ... fitting, heat enveloping, heat sealing, metal desiccating, nut inserting, rotor inserting,etc.D: precious metals melting. E. dry resin, ...