DIN EN 4613:2020
航空航天系列 带自润滑衬里的耐腐蚀钢球面滑动轴承,窄系列 尺寸和载荷 英制系列
Aerospace series - Spherical plain bearings in corrosion resisting steel with self-lubricating liner, narrow series - Dimensions and loads - Inch series; German and English version FprEN 4613:2020