Ibice by'ingenzi bikoranaho (impellers na liners) bikozwe mu byuma bikomeye kandi bidashira cyangwa alloys zidasanzwe kandi binozwa kugira ngo bishobore kwihanganira ubukana bwinshi bw'ibikoresho birwanya ubukana (nka corundum, silicon carbide, na spinel), bikongera igihe cyo gukoresha ibikoresho no kugabanya ikiguzi cyo kubibungabunga.
Kunoza cyane imiterere y'ibice bihindura ...ibintu bihindura imiterere y'umubiri;
Icyondo gikangwa kandi kivanze kiba kimwe kandi gihuye, kandi ntigitandukanya;
Mu rwego rwo kwemeza ko imvange ikora neza, ubucucike bw'uruvange buba buri hejuru, kandi nta kintu cyoroshye kiba kirimo.