Daim vis dis aus no qhia txog peb cov tub rau khoom zoo. Nws muaj peev xwm super bearing, nrog lub peev xwm siab tshaj plaws ntawm 35kg. Nws lub laub-rub yog yooj yim thiab du. Tom qab 50000 qhib thiab kaw cov kev xeem, nws tseem ruaj khov thiab ruaj khov los xyuas kom meej lub neej kev pab cuam ntawm cov swb rail. Tsis tas li ntawd, txhua qhov thawb thiab rub ntawm nws yog ntsiag to, ntsiag to heev.