| 摘要 |
<p>Greenhouses for growing plants. Improvements to greenhouses of the type consisting of a metal structure formed from truss frames with rafters (10) supporting purlins (6), on which are fixed glass-pane bars (7) supporting the glazing of the roof, characterised in that they comprise supports (12) for raising the purlins (6) relative to the truss frames, and, beneath each glass-pane bar (7), flaps (19) mounted tiltably and connected to means for controlling their tilting. <IMAGE></p> |
