FIELD: agriculture. SUBSTANCE: block greenhouse ventilation system has roof framework with pans 1, ridges and roof windows connected with drives. System is furnished with additional continuous windows 2 located at both sides of pans 1 on horizontal window sill shafts 4 for turning around the shafts. Horizontal sill shafts 4 are displaced relative to pans 1 through 1/3-1/4 of width of continuous window 2 and are connected with drive 7 by means of gear train 5. EFFECT: enlarged operating capabilities. 5 cl, 2 dwg
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HOTHOUSE VENTILATION SYSTEM | 1992 |
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Authors
Dates
1995-07-09—Published
1992-07-16—Filed