Qhov kev sib txhuam sib txhuam nrog ncej yog ua los ntawm cov khoom zoo txhuas alloy. Cov xov paj sib dhos muaj anti-zoo li qub, hnav-resistant thiab lwm cov nta, qhov tseeb ntawm yarn pub tau zoo dua. Thaum cov khoom noj khoom haus kom muaj nyob ntawm 8000 rpm (sib npaug rau 15 meters / thib ob), peb lub qhov muag liab tsis tuaj yeem muaj lwm hom kev sib txhuam rau koj xaiv. Peb kuj tuaj yeem ua cov qauv koj xav tau. Xav kom peb paub.