Khoom ua haujlwm
Khoom siv: high manganese cam khwb cia hlau
Khoom siv: Mn14Cr2, Mn18Cr2, thiab lwm yam
Loj: cov neeg siv khoom xav tau
Daim ntawv thov: thee mine machinery qhov chaw
Muaj feem xyuam kev lag luam: Zog thiab mining
Txheej txheem: Poob pwm casting, machining, kho cua sov
