... quality assurance system. Main products: ZDY, ZLY, ZSY, ZFY, DBY(K), DCY(K), and DFY Hardened reducers; NGW, NGW-L, and NGW ... -S planet gear speed reducers; B and X series of cycloidal ... Y-type 315-630 oil cooling electric drive drums. Recently, S, K, R, F, and T series of modular reducers have come ...