... straight cargo trolley, turntable roller skids, crawler type roller skate, steerable machine skate, veered moving roller skids, geared roller skids, and so ... PU wheels cargo trolley, nylon wheels roller skate, steel wheels machine skate. Machine skates can move heavy duty loads ... moving skates professionally for more than 20 years. Our machine rollers classifies as follow: 3-point roller dollies, go ...