Kev xa tawm yog taw qhia rau kev tsim khoom lag luam xws li cov khoom siv hluav taws xob, khoom siv hluav taws xob, cov khoom siv hluav taws xob, PCBs, cov khoom siv precision, yas, pwm, lithium roj teeb, thiab lub zog tshiab. Nrog peb pab neeg cov kev paub txog kev txawj ntse thiab kev nplua nuj nyob rau hauv lub zeem muag ntsuas kev lag luam, peb tuaj yeem muab cov neeg siv khoom tiav. Kev ntsuas thiab ntsuas qhov muag pom kev daws teeb meem txhawb kev txhim kho kev tsim khoom kom muaj txiaj ntsig zoo dua, zoo dua thiab kev txawj ntse dua.