Two handwheels and screwrods to manually operate window ventilation in a large greenhouse

---

Size: 2831px × 4256px
Photo credit: © WilliamRobinson / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: arm, bar, climbing, crank, glass, glasshouse, greenhouse, hand-wheels, handle, handwheels, horticulture, linkage, manually, operated, panes, plants, rod, rods, screwrods, stone, vent, ventilation, venting, vents, wall, wheel, wheels, white, window, windows