Forged yog ib lub tuam txhab paub zoo rau cov hlau refractory hauv Suav teb. Nrog 20 xyoo kev paub thiab ntau tshaj 100 cov khoom tsim, peb nkag siab zoo txog tus cwj pwm thiab lub peev xwm ntawm molybdenum, tungsten, tantalum, thiab niobium. Ua ke nrog lwm cov khoom siv hlau thiab ceramic, peb tuaj yeem hloov kho cov khoom ntawm cov hlau raws li koj cov kev xav tau tshwj xeeb.
Peb lub lag luam nyob qhov twg: Txog tam sim no peb tau tsim cov neeg sawv cev prosy hauv Algeria, Egypt, Iran, South Africa, Is Nrias teb, Malaysia thiab lwm lub tebchaws Esxias Qab Teb Hnub Tuaj. Kuj tseem nyob hauv Middle East thiab South America. Peb muaj ib tug khub thiab muaj coob tus neeg muas zaub.
