... performance, production speed more 120 M/Min. The model of aluminum spacer include: 6A,9A,12A,14A,15A,16A,19A,20A ... welder, straightening and shaping machine, flying saw. 4. High frequency welder use chopped wave type high frequency power supply, welding speed 100 ... -120 M/Min. 5. The requirement of aluminum spacer: A. Wall thickness: Wall ...