Thaum lub qhov rooj hluav taws kub qhib, nws tsuas yog xav tau 1 KG quab yuam, thiab qhov qhib qhov nro tsawg dua 50N, txawm tias cov neeg nyob hauv lub rooj zaum muaj log tuaj yeem qhib tau yooj yim. Hlau qhov rooj qhov rooj kov txoj haujlwm yog tsim los tsim tib neeg, tsis hais cov neeg laus lossis menyuam yaus tuaj yeem yooj yim thawb thiab rub, ua kom siv tau yooj yim dua, xis nyob.

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