NF L31-252*NF EN 3046:1994 航空航天系列 飞机骨架滚动轴承 刚性单排镀镉钢滚珠轴承 直径系列为0和2.对比间隙等级 尺寸和负荷
Aerospace series. Bearings, airframe rolling. Rigid single row ball bearings in steel cadminium plated. Diameter series 0 and 2. Reduced clearance category. Dimensions and loads.