滾珠軸承或滾柱軸承的內部組件,為減摩軸承的滾動元件提供接觸面。
nomenclature: ring retaining (vk0400) part name assigned by controlling agency, part of: hawker 800xp/850xp; fitting instl-nose landing gear and door pick-up; raytheon aircraft co.; 53-10-10 item 190 special features, hawker 800xp/850xp end item identification