Muaj zog bearing muaj peev xwm adjustable hlau antislip thiab poob siab absorbing galvanized steel kho rau lean yeeb nkab system.
Peb yog cov chaw tsim khoom kho.Peb cov khoom muag ncaj qha los ntawm cov chaw tsim khoom.Nrog tus nqi qis thiab kev xa khoom loj, peb yog qhov kev xaiv zoo tshaj plaws rau cov neeg muag khoom.