<math> = \dfrac {A_u \cdot 10^{-7} \cdot r_{D(n)}} {\tfrac {b_R \cdot h_R \cdot s_{RR}}{D \cdot 60 \cdot f_Z} + (b_R + \frac {h_R}{2}) \cdot \frac {k_f}{2}} </math>
= A u ⋅ 10 − 7 ⋅ r D ( n ) b R ⋅ h R ⋅ s R R D ⋅ 60 ⋅ f Z + ( b R + h R 2 ) ⋅ k f 2 {\displaystyle ={\dfrac {A_{u}\cdot 10^{-7}\cdot r_{D(n)}}{{\tfrac {b_{R}\cdot h_{R}\cdot s_{RR}}{D\cdot 60\cdot f_{Z}}}+(b_{R}+{\frac {h_{R}}{2}})\cdot {\frac {k_{f}}{2}}}}}
