1. Iyo gutema ibiti bikozwe nabi, biterwa no kutitonda kwicyuma. Igomba gutondekwa mugihe, ariko ntuhindure inguni yumwimerere yicyuma cyangwa gusenya imbaraga zingana. Ntugatunganyirize umwobo cyangwa ngo ukosore diameter y'imbere wenyine. Niba udatunganije neza, bizagira ingaruka kumikoreshereze yicyuma kandi bishobora guteza akaga. Ntukagure umwobo urenze cm 2 kurenza umwobo wambere, bitabaye ibyo bizagira ingaruka kuburinganire bwicyuma.

2. Icyitonderwa cyo kubika: Niba icyuma kibonye kidakoreshejwe igihe kinini, icyuma kibonye kigomba kumanikwa, cyangwa gishobora gushyirwa hejuru ukoresheje umwobo w'imbere, ariko nta kintu kiremereye gishobora gushyirwa ku cyuma. Icyuma kibisi kigomba gushyirwa ahantu humye kandi gihumeka, kandi hagomba kwitonderwa ubushuhe no kwirinda ingese.

Icyuma kibisi nikintu cyingenzi cyimashini zikora ibiti. Ubwiza bwikibabi kizagira ingaruka ku mikorere yimashini yose. Niba icyuma kibonye gihindutse, gutunganya neza bizaba bike cyane.