(1) alumina sib tsoo micro Cheebtsam rau zoo alumina, nrog siab purity, siab zog, siab hardness, siab whiteness, tsawg hnav, yeej tsis cuam tshuam rau qhov zoo ntawm cov khoom sib tsoo.
(2) Peb tau tsim lub pob tshwj xeeb rau kev sib tsoo qhuav nrog zoo toughness thiab hnav tsis tshua muaj, uas daws cov teeb meem tshwm sim ntawm kev sib tsoo nruab nrab ntawm cov khoom siv raw hauv kev lag luam hmoov.
(3) Cov khoom muaj qhov hnav tsis zoo thiab tuaj yeem txuas ntxiv lub neej kev pabcuam ntawm lub cev abrasive.
