● Sib sib zog nqus groove pob yog ib qho ntawm feem ntau siv dov bearings.
● Tsis tshua muaj kev sib txhuam, kev kub ceev.
● Cov qauv yooj yim, siv tau yooj yim.
● Siv rau gearbox, ntsuas thiab ntsuas, lub cev muaj zog, khoom siv hauv tsev, lub tshuab hluav taws xob sab hauv, tsheb tsheb, tsheb ua liaj ua teb, kev tsim kho tshuab, kev tsim kho tshuab, cov menyuam cov menyuam skates, yo-yo pob, thiab lwm yam.