Dab tsi yog qhov txawv ntawm kev sim hluav taws xob rauv thiab muaj hluav taws xob ua hluav taws xob:

Hais txog qhov sib txawv ntawm ob, ua ntej ntawm tag nrho cov, muaj hluav taws xob furnaces kuj hu ua txuas hluav taws xob rauv, thiab kev sim hluav taws xob furnaces kuj hu ua intermittent electric furnaces. Qhov sib txawv ntawm lawv yog feem ntau nyob rau hauv lub cev ntawm lub cub tawg thiab lub Scope ntawm kev siv:

Kev sim hluav taws xob rauv yog ib hom kev lag luam hluav taws xob hluav taws xob uas muaj qhov kub ceev ceev, tsis muaj kev noj haus thiab qhov cub zoo kub sib xws. Nws yog siv nyob rau hauv lub chaw soj nstuam, kev lag luam thiab mining lag luam rau hlau ntsiab tsom xam thiab kev txiav txim siab thiab kev kho cua sov dav hlau.