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Manufacturers of perforated pipe are often able to provide the open area per meter length.
Manufacturers of perforated pipe are often able to provide the open area per meter length:
<math>\frac{Q_{max, p}=L\times B\times C_{d}\times A_{o}\sqrt{2\cdot g\cdot \sum d}}{1000}</math>
<math>\frac{Q_{max, p}=L\times B\times C_{d}\times A_{o}\sqrt{2\cdot g\cdot \sum d}}{1000}</math>