... within 3-5seconds heating.B, Metal material heating annealing, convenience to stretch. Modeling embossing Etc. such as steel pipe stretch, ... of the heating and heating repetitive,easy to simpliy workers.3.simple to install, connect to the three-phase 380V power supply, ... minutes.4.Covers an area of very small,easy to operate, a few to minutes to the institute.5.in particular security,lower than the ...