... 3. hydraulic type 4. economic hydraulic elbow making machine,gorelocker,spiral duct machinery,is for making duct elbows, max. thickness 1.2mm, max ... dia 1000mm.Hydraulic elbow making machine,gore locker,spiral tube former 3.1 Max. thickness of ... 900mm3.7 Weight: 750kg spiral duct machinery, gorelocker, hdyraulic elbow making machine. hydraulic elbow making machine