The solid droppings are collected and dumped into the sump.
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https://paperspast.natlib.govt.nz/periodicals/NZJAG19410815.2.26.2
Bibliographic details
New Zealand Journal of Agriculture, Volume 63, Issue 2, 15 August 1941, Page 106
Word Count
10The solid droppings are collected and dumped into the sump. New Zealand Journal of Agriculture, Volume 63, Issue 2, 15 August 1941, Page 106
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