YIJIANG waxay ku takhasustay soo saarista qaybaha gurguurta ee xamuulka qaada ee MOROOKA, oo ay ku jiraan rullaluistemadka raadadka ama rullalulatada hoose, sprocket, rullaluistemadka sare, cirifka hore iyo jidka caagga ah. Jidadka caagga ah waxay ku habboon yihiin moodooyinka Morooka oo ay ku jiraan MST300, MST600, MST800, MST1500, MST2200, iyo MST3000, iwm.