Aosite, txij 1993
Nyob rau hauv lub txee kho vajtse accessories, ntxiv rau cov tub rau khoom muaj feem xyuam nrog cov swb, kuj tseem muaj ntau hom khoom siv xws li pneumatic thiab hydraulic. Cov khoom siv no yog tsim los hloov mus rau kev hloov pauv ntawm cov khoom siv, thiab feem ntau yog siv rau lub qhov rooj flip-up thiab ntsug nqa qhov rooj. Qee cov khoom siv muaj peb lossis ntau dua braking txoj haujlwm, tseem hu ua random nres. Cov txee nruab nrog cov cuab yeej siv siab yog kev ua haujlwm txuag thiab nyob ntsiag to, uas tsim nyog rau cov neeg laus.