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[[Category:Glossary]] [[Category:Turf]] | [[Category:Glossary]] [[Category:Turf]] | ||
1. In an installed drain system, a | 1. In an [[installed drain system]], a [[grade]] point lower than the downward sloping collector pipe. <br> | ||
<br> | <br> |
Revision as of 12:03, 23 February 2006
1. In an installed drain system, a grade point lower than the downward sloping collector pipe.