The perforations being a complete cut-out in the circumferential direction covering the

Official title: {the perforations being a complete cut-out in the circumferential direction covering the whole diameter of the tube, i.e. having two consecutive tubes placed consecutively, the additional component being introduced between them}

B01F25/314231 (The perforations being a complete cut-out in the circumferential direction covering the) appears on 6 US grants and 6 published applications in this corpus.