(1) hydraulic press machine (2) three-beam four-column type (3) usage for upsetting, punching, stretching etc (4) hot forging ZDYJ-B series of open forging hydraulic machine is mainly used for various process of metal material forging, which include billet drawing, upset forging, punching hole, reaming, offset, rough rotation, and bending etc.This machine is of three-beam four-pillar structure, ...