DIN EN 4538-2-2014 航空航天系列. 低振幅下带自润滑衬料提升载荷的耐腐蚀钢制球形平面轴承. 窄系列. 尺寸和负载. 第2部分: 英制系列; 德文和英文版本EN 4538-2-2014
Aerospace series - Bearings, spherical plain, in corrosion resisting steel with self-lubricating liner elevated load under low oscillations - Narrow series - Dimensions and loads - Part 2: Inch series; German and English version EN 4538-2:2014