YOT型调速液力偶合器
YOT governing hydraulic coupling
液力变速装置
Hydraulic transmission gears
液力变速箱
hydraulic transmisson box
液力变速驱动装置
hydraulic variable speed driver
液力变扭器可转导叶
guide vanes of hydrodynamic torque converter
液力变矩器外环
Outside ring of hydraulic torque converter