... hydraulic system, tube expanding gun, tube expanding head, high pressure tube, control box, etc. The principle is powered by hydraulic ... has obtained national patent. (ZL.99227566.0)2. Portable pipe expanding gun has advantages of reasonable design, small ... OilVOLTAGE: Three-Phase Current 380V/50HZINPUT POWER: 6.5KWCONTROL SYSTEM: Electronic Modular, Single Chip Microcomputer, Digital Display, ...