... 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 ... x 800mm x 900mm3.7 Weight: 750kg spiral duct machinery, gorelocker, hdyraulic elbow making machine. hydraulic elbow ...