Peb cov khoom tseem ceeb suav nrog cov tshuab tsis siv neeg davhlau ya nyob twg, 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 zoo li txhua yam ntawm cov tshuab davhlau ya nyob twg, khoos phis tawj hlau stripping tshuab, hlau labeling tshuab, tsis siv neeg pom raj txiav tshuab, daim kab xev winding tshuab thiab lwm yam khoom muaj feem xyuam.