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  • B21D9/00
    		•  Bending tubes using mandrels or the like (B21D 11/02-B21D 11/18 take precedence) HB CC 4E063
  • B21D9/00@A
    		•  Multi-layered tubes HB CC 4E063
  • B21D9/00@Z
    		•  Others HB CC 4E063
  • B21D9/01
    		•  .the mandrel being flexible and engaging the entire tube length HB CC 4E063
  • B21D9/03
    		•  ..and built-up from loose elements, e.g. series of balls HB CC 4E063
  • B21D9/04
    		•  .the mandrel being rigid [2] HB CC 4E063
  • B21D9/05
    		•  .co-operating with forming members HB CC 4E063
  • B21D9/07
    		•  ..with one or more swinging forming members engaging tube ends only HB CC 4E063
  • B21D9/08
    		•  .in press brakes or between rams and anvils or abutments; Pliers with forming dies HB CC 4E063
  • B21D9/10
    		•  .by passing between rollers HB CC 4E063
  • B21D9/12
    		•  .by pushing over a curved mandrel; by pushing through a curved die HB CC 4E063
  • B21D9/14
    		•  .Wrinkle-bending, i.e. bending by corrugating HB CC 4E063
  • B21D9/15
    		•  .using filling material of indefinite shape, e.g. sand, plastic material [2] HB CC 4E063
  • B21D9/15@A
    		•  Ice HB CC 4E063
  • B21D9/15@B
    		•  Resin HB CC 4E063
  • B21D9/15@C
    		•  Fusion metal HB CC 4E063
  • B21D9/15@D
    		•  Sand, steel balls HB CC 4E063
  • B21D9/15@Z
    		•  Others HB CC 4E063
  • B21D9/16
    		•  .Auxiliary equipment, e.g. machines for filling tubes with sand HB CC 4E063
  • B21D9/18
    		•  ..for heating or cooling of bends HB CC 4E063
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