DIN EN 3288:1994
航空航天系列.机体用轴承.镀镉钢双列自定心滚珠轴承.直径系列 2.尺寸和负载; 德文版本 EN 3288:1994
Aerospace series; bearings, airframe rolling - Double row self-aligning ball bearings in steel, cadmium plated - Diameter series 2; dimensions and loads; German version EN 3288:1994