angle of half intensity 半值角
half-intensity light angle 半光强角
the angle width at half maximum intensity 半最大值全角宽度
acceptance half-angle 接收半角
acceptance halfangle 接收角
beam half-angle 束半张角
contact half angle 接触半角
Convergence half angle 阴极半锥角
Convergent half angle 收敛半角
Divergent half angle 扩张半角
entry natural converging half angle 入口自然收敛半角
expansion cone half angle 扩张半角
formulae for half-angle 半角公式
half angle 半角; 半形
half angle formula 半角公式
half angle formulas 半角公式
half intensity width 半强宽
half-angle 半角
half-angle of mould 模子半角