Vloeimeetskyf: Verskil tussen weergawes

<math>V = 0.00039604 C d_o^2 \sqrt{h_w \over SG}</math> {{spaces|10}} of {{spaces|10}} <math>h_w = SG \left ( {V \over 0.00039604 C d_o^2} \right )^2</math>