< P style = "text indent: 2em;" > this paper mainly talks about the product parameters of channel steel three side punching. Processing variety: square tube and round tube, Br / > the longer the cutting speed of the steel bar is, the longer the cutting speed is (BR / > more than 50 times of hydraulic cutting speed of the steel bar) < br / > the cutting speed of the steel bar is less than 50 times />Angle feeding speed: < br / > programming method: keyboard input directly, supporting 200 groups of data storage