... , Shipyard Crane, heavy-duty Truck Crane, and so on. 2. Structure Drawing 3. Application (1). Wind generatorTower and yaw ... , treatment with the overall quenching, raceway select surface-hardening. (2). Marine CraneIn general, marine crane use double-row different diameter ... row roller slewing bearing, slow rotation (10). ShieldDiameter from 2.5 meters to 6 meters, some larger diameter, these bearings ...