Sib nqus sib dhos yog cov khoom siv dav siv uas cov hlau nplaum (xws li NdFeB, Ferrite, SmCo, thiab lwm yam) thiab lwm yam ntaub ntawv (tsuas yog hlau, hlau, yas, thiab lwm yam) tau sib sau los ntawm gluing, txhaj tshuaj lossis lwm yam txheej txheem.Qhov kom zoo dua yog txhim kho txhua yam thiab sib nqus lub zog thiab tiv thaiv cov hlau nplaum los ntawm kev puas tsuaj.