This machine has low noise and long lifetime. It equipped with numercial regulator,in pression of < xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />0.01mm. It equipped with protection pads which protect dies against the possibility of failure installlation. Amount of opening with dies,suitable for cramping special-shaped bend.Dies can be changed integrally,quickly and for facility.