Peb cov khoom tseem ceeb muaj xws li tsis siv neeg davhlau ya nyob twg tshuab, tsis siv neeg hlau davhlau ya nyob twg tshuab, kho qhov muag volt tsis siv neeg cov cuab yeej thiab lub zog tshiab hlau hlua tsis siv neeg ua cov cuab yeej raws li tag nrho cov hom ntawm lub davhlau ya nyob twg cov cav tov, computer hlau stripping tshuab, hlau labeling tshuab, tsis siv neeg pom raj txiav machine, daim kab xev winding tshuab thiab lwm yam khoom muaj feem xyuam.