Zhen ib co hwv thoob ntiaj teb co., Txwv

Zhennan {- yog kev lag luam tshwj xeeb hauv kev tsim khoom, kev lag luam, luam tawm cov khoom siv metallurgical nrog ntau dua {{xyoo dhau los ntawm kev paub. Peb tau cog lus los muab cov khoom lag luam zoo ferro alloys, silicon hlau thaiv / silicon hlau hmoov, Ferro Vanadium. Vanadium pentoxide flakes, elecolytic manganese flakes. Peb siv zog los muab cov kev daws teeb meem ua tiav uas phim cov neeg siv khoom 'txheej txheem los ntawm kev xa tawm "txoj cai zoo thiab ntau". Raws li kev ua haujlwm metallgical Raw Khoom Siv Khoom Siv Khoom Siv, peb ib txwm muab cov khoom ua ntej ua ntej. Peb siv cov khoom siv thev naus laus zis thiab thev naus laus zis, los ntawm cov khoom siv tswj cov khoom nyoos, kom ntseeg tau tias peb cov khoom lag luam kom tau raws cov qauv kev lag luam.

30 +Ntau xyoo ntawm kev paub