In lifting equipment, the large diameter bearing serves as a joint between the upper structure and the undercarriage, providing a means of 360-degree rotation.
N'ime kreenu ụgbọ mmiri, mgbanaka na-egbu egbu na-eje ozi dị ka njikọta n'etiti usoro dị elu na okpuru ala, na-enye ntụgharị ntụgharị ogo 360.