‧ The specifications and installation dimensions of URV+UMRV / UMRV+UMRV series worm gear reducers 
     are compatible with that of NRV+NMRV / NMRV+NMRV series worm gear reducers.
‧ URV+UMRV and UMRV+UMRV series speed reducers.
‧ A combination of two-stage worm gears provides greater speed reduction ration and 
    more flexible mounting methods.