DIN EN 4540-2012 航空航天系列.低振动状态下高负荷的自润滑衬套耐腐蚀钢球面普通轴承.技术规范.德文和英文版本EN 4540-2011
Aerospace series - Bearings, sperical plain, in corrosion resisting steel with self-lubricating liner, Elevated load under low oscillations - Technical specification; German and English version EN 4540:2011