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Line 47:
Line 47:
| See below
| See below
| See below
| See below
−| 0.4 for clear stone aggregate; Higher effective porosity can be achieved by including void-forming structures
+| 0.4 for clear stone aggregate below the perforated pipe; Higher effective porosity can be achieved by including void-forming structures
|}
|}
Before you begin you will need to know the following;<br>
Before you begin you will need to know the following;<br>