... can auto change the profile and specifications, and there are screen showing the changes. In mass production, the PLC can control ... the profile, specification, length, punching cutting, and roll forming. JCZ-350 changeable purlin machine consists of hydraulic decoiler, flattening device, 2 ... ://en.jgtec.com.cn/index.asp http://jgrollformingmachine.com/ JCZ-350 c/z changeable purlin machine`