Kev faib tawm fais fab fais fab
Raws li cov tawv tawv ntawm cov khoom, nws tuaj yeem muab faib ua cov txhuam muag muag, nruab nrab-tawv txhuam txhuam thiab cov tawv tawv txhuam.
Raws li cov khoom siv ntawm tus txhuam, txhuam tau muab faib ua txhuam rau lub tshuab ua kom lub tshuab hluav taws xob, txhuam txhuam rau cov hlau muaj zog, txhuam rau lub cav muaj zog, txhuam rau lub tsheb thiab lub tsheb laij, txhuam hniav rau cov cuab yeej hluav taws xob, thiab hluav taws xob rau cov tshuab hluav taws xob.
Raws li cov xim ntawm lub txhuam hluav taws xob, nws muab faib ua cov txhuam hluav taws xob dub (ua los ntawm cov ntshiab carbon graphite khoom) thiab cov xim txhuam fais fab (ua los ntawm tooj liab thiab lwm yam khoom siv hlau thiab graphite).
Raws li cov ntawv txhuam txhuam sib txawv, nws muaj peev xwm raug faib ua: graphite txhuam; electrochemical graphite txhuam; hlau graphite txhuam.