ZLY series Cylindrical gear reducer: Transmission efficiency more than 96.5%,used for metallurgy, mines, hoisting, transport,etc The speed reducers include 4 kinds of series: ZDY(single-stage), ZLY(two-stage), ZSY(three-stage), ZFY(four-stage), and 57 kinds of sized, 54 kinds of speed ratios (People's Republic Of China major standard: JB/T8853-2001). They are mainly used in metallurgy, mine, ...