A packing for a vessel to contact fluid therein wherein the packing comprises a plurality of insert units, each insert unit comprising a plurality of transversely extending elements disposed longitudinally along the insert unit and angularly thereabout wherein a portion of each transverse element lies...http://www.google.es/patents/US5194231?utm_source=gb-gplus-sharePatente US5194231 - Packing in or for a vessel
