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→5.4.1 Design Formulas
|<math>P =
\frac {4b TB s^2}{L} </math>
|-
|U-shaped element
|<math>A =
\frac {T L^2}{2s} </math>
|<math>P =
\frac {4c AB s^3}{L^3} </math>
|-
|Spiral
|<math>M_P_{max} < \frac {2 \sigma Bss^2}{63} </math>
|-
|Helical spring
