Qhov no yog lub tshuab npog ntsej muag tsis siv neeg feem ntau yog siv los ua lub ntsej muag folding.Nws siv tshuab ultrasonic los vuam 3 mus rau 6 txheej ntawm cov ntaub ntawv tsis-woven, yaj-tshuab ntaub, activated carbon thiab lim cov ntaub ntawv, non-woven fabrics, thiab nws muaj peev xwm tsim n95, kn95, n90 qhov ncauj qhov ntswg.