Hom kev tiv thaiv kev ruaj ntseg Cov cuab yeej sib cuam tshuam: xws li lub qhov rooj ruaj ntseg txav tau, kev sib cuam tshuam kev hloov, thiab lwm yam 4. Ib qho khoom siv fastening, xws li lub laj kab lossis kev tiv thaiv npog;Rub rov qab ntaus ntawv: yog khi rau ntawm tes, nias down, txuas yuav rub tes tawm ntawm qhov chaw txaus ntshai;Adjustable kev ruaj ntseg tiv thaiv ...
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