1.[Rooj hloov khaub ncaws] Tsuas yog qhib lub zipper thiab ntxig tus pas nrig txhawb nqa, nws tuaj yeem muab qhov chaw nyab xeeb thiab huv rau tus menyuam. Nws ntev li 30 nti, dav 12.6 nti thiab siab 9 nti ntawm ob sab. Lub hauv ncoo mos ua rau tus menyuam nyob ntsiag to thiab xis nyob, lub laj kab ntawm ob sab tiv thaiv tus menyuam kom tsis txhob tig rov qab, sab mesh ua pa tau muab cua ntws tas li, thiab daim ntaub thaiv qhov muag tiv thaiv tus menyuam lub qhov muag thiab daim tawv nqaij. Koj tuaj yeem siv qhov chaw no ua qhov chaw xis nyob rau koj tus menyuam pw tsaug zog.