... machines, harbor and ship mechanism and high precision large turning tables for radars and missile launchers.3) the range ... slewing,Crossed cylindrical roller slewing bearing ,Single-row-4-point Contact Ball Slewing Bearings ,Three-row cylindrical roller ... packageMarketEurope,America,Middle East,Asia,etc Single-row-4-point Contact Ball Slewing Bearings (external-gear type)DesignationsBoundary ...