Aerospace; bending radii for tubes; approximate values for cold working
航空航天管子弯曲半径；冷加工的近似值
1985-06-01
DIN 9003-1
Aerospace; bending of sheets, plates and strips of steel and heat-resisting alloys, bending radii, directions for design
航空航天钢和耐热合金薄板、板材和带材的弯曲 弯曲半径 设计指南