YIHO yog lub ntiaj teb ua lag luam muab kev daws teeb meem rau Mining thiab cov khoom siv tuav kev lag luam, tshwj xeeb hauv kev sib tsoo xov xwm thiab hnav cov ntaub thaiv npog ceramic.
Nrog peb cov kws tshaj lij thiab cov thev naus laus zis thev naus laus zis, peb muab cov kab tiav ntawm cov khoom lag luam uas ua tau raws li kev xav tau ntawm peb cov neeg siv khoom thoob ntiaj teb.
Tiv tauj peb hnub no kom paub ntau ntxiv txog peb cov khoom lag luam nthuav dav thiab peb tuaj yeem pab txhawb koj li kev lag luam li cas.
Tiv tauj peb