1.copper valve 2.Air-conditioning valve 3.Three-way valve 4.Plumbing valve 5.half mold The machine tool can heat the material with intermediate frequency heating of electric and ethyne,liquid gas,make the single forming of products in the mould by using of the upsetting force of machine,and can be used for upsetting the irregular parts like round,hexagonal,barrel type,and valve parts etc. With ...