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 txawj ntse txawj ntse thiab kev nplua nuj nyob rau hauv lub zeem muag ntsuas kev lag luam, peb muaj peev xwm muab cov neeg muas zaub nrog tiav qhov ntev. Kev ntsuas thiab ntsuas qhov muag pom kev daws teeb meem txhawb kev txhim kho kev tsim khoom kom ua tau zoo dua, zoo dua thiab kev txawj ntse dua.