Changes

Jump to navigation Jump to search
no edit summary
Line 34: Line 34:
| [[choker layer|Choker course]]
| [[choker layer|Choker course]]
| colspan="2" |100 mm
| colspan="2" |100 mm
| 0.4 typical
| 0.4
|-
|-
| Perforated pipe and surrounding aggregate
| Perforated pipe and surrounding aggregate

Navigation menu