including an additional treatment performed by fluid pressure, e.g. perforating

Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces > by applying fluid pressure > Deforming tubular bodies > including an additional treatment performed by fluid pressure, e.g. perforating

Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces (stamping using resilient pads B21D22/10) > by applying fluid pressure > Deforming tubular bodies (corrugating tubes by applying fluid pressure B21D15/03, B21D15/10) > including an additional treatment performed by fluid pressure, e.g. perforating