Impamvu yo kunanirwa kumeneka nyuma y amezi 18 yumubyimba wicyuma utagira umuyonga wakoze mumezi 18, hanyuma valve yamenetse iramenyekana kandi isesengurwa kuri valve yamenetse, tissue ya zahabu, hamwe nibigize imiti. Ibisubizo byerekana ko umwanya wacitse wa valve ari igikonoshwa kandi ikintu cyo kuyungurura cyongera gusuzuma ikibanza, ni ukuvuga kugirango uhangane igice kinini cyumuvuduko wa gaze, isoko yisuri nisoko yamenetse byaturutse kumuzi wurudodo rwimbere, rwagutse hejuru yimbere yimbere yikibabi cya valve kugeza hanze Ibikoresho ni ferrite + martensite ibice bibiri bya 15% kuri perchine. Munsi yumubiri wavunitse umunwa uringaniye, kandi ibice hagati yintete birarangiye, byerekana ibiranga uduce duto. Hariho gutandukana kwinshi mubirimo CR na Ni muburyo bwa filteri ya valve umubiri, kandi ibiri muri ferrite birenze 10%, bigabanya ubukana bwa plastike bwibikoresho. Iki nicyo kintu cyihariye mu kunanirwa kw'ibikoresho; Isuri ivanze nicyiciro cya kabiri cya karubone -rich na chromium mugusubirana ibintu, hamwe no gucikamo agace yibanda cyane. Bitewe ningaruka zo guhinduranya imbaraga, igikoma kiraguka, kandi ibikoresho bizavunika.