Вентиляция в улье из дерева, ППУ, альпийца, небоскрёба. Немного много физики.
#пчелы #пчеловодство #улья #зимовкапчел
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![[SFM] Дед](https://sun9-2.userapi.com/CJUF4mqGXJ19M3_X3_S79aw_t2JzMGqWtghvUw/QIDzMRv3_xo.jpg)
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