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Lub raj mis iav yas Dropper rau cov roj tseem ceeb
Cov hau dropper yog lub hau ntim uas feem ntau siv rau cov tshuaj kua lossis cov tshuaj pleev ib ce. Lawv tus qauv tsim tso cai rau cov neeg siv kom yooj yim ntws lossis rho cov kua tawm. Tus qauv tsim no pab tswj kev faib cov kua kom raug, tshwj xeeb tshaj yog rau cov xwm txheej uas xav tau kev ntsuas kom meej. Cov hau dropper feem ntau yog ua los ntawm yas lossis iav thiab muaj cov khoom kaw ruaj khov kom ntseeg tau tias cov kua tsis nchuav lossis xau.
