welding manipulator is composed by column, boom, guider block, trolley, elevator, extend, column rotator, trolley driver, etc. LH3550 ... featuresThe column & boom is composed by column, boom, guider block, trolley, elevator, extend, column rotator, trolley driver, etc.The column, boom, guider ... are from Siemens or Schneider. 3. Supply range:Column & Boom, Lincoln DC-1000, NA-3S or Chinese welding ...