Los ntawm cov txheej txheem tua hluav taws, ntxiv ferric oxide, manganese dioxide yog cov txheej txheem ib txwm ua, tom qab lub cev thiab tshuaj lom neeg cov tshuaj tiv thaiv, yuav tsim cov silicate ruaj khov, tib neeg lub cev muaj kev noj qab haus huv thiab nyab xeeb; los ntawm kev yug ntawm cov khoom siv ceramic ze li ntawm 20 xyoo ntawm keeb kwm, tsis tau ...
Nyeem ntxiv