Tsim los rau cov tsheb thauj khoom hnyav, cov thav duab khoom siv hauv kev lag luam, thiab cov chaw ua haujlwm txawb uas ruaj khov, peb cov log tsheb kauj vab uas hnyav 151-200 kg (332-440 lbs) muab kev txhawb nqa zoo. Txhawm rau kom tuav tau cov khoom muaj peev xwm siab yam tsis muaj qia khoov lossis tshem xov, lawv muaj cov log tsheb hnyav ntxiv. Ua los ntawm 2 nti thiab siab dua nrog cov treads hnyav, tsis muaj cim, lawv ua kom muaj kev tshem tawm ntawm qhov teeb meem thiab cov txheej txheem xauv ruaj khov. Tsis pom qhov koj xav tau? Tiv tauj peb kom tau kev taw qhia.
