Tsim los rau cov tsheb thauj khoom lag luam, cov tsheb thauj khoom hnyav, thiab cov khoom siv hauv tsev rau khoom ruaj khov, peb cov log tsheb hnyav 201-907 kg (443-2000 lbs) muaj peev xwm thauj khoom tau ntau heev. Muaj cov hlau tuab, hlau forged sab saum toj rau kev sib txuas tsis yooj yim, lawv tshem tawm cov qauv buckling hauv qab qhov hnyav hnyav hauv kev lag luam. Ua los ntawm cov qhov loj me 2 nti thiab siab dua nrog cov treads uas tiv taus kev cuam tshuam, tsis muaj cim, lawv lav kev txav mus los zoo hauv cov plag tsev khov kho thiab muaj kev xaiv xauv tau zoo. Tsis pom qhov koj xav tau? Tiv tauj peb kom tau kev taw qhia.
