NF L31-284-2007
航空航天系列.机身转动轴承.耐腐蚀钢中带法兰外圈内径递减的自准双列自调滚珠轴承.尺寸和负荷
Aerospace series - Bearings, airframe rolling - Double row self-aligning ball bearings with flanged outer ring in corrosion resisting steel, reduced internal radial clearance - Dimensions and loads.