| 摘要 |
A greenhouse over an agricultural bed or the like comprising a rotating structure. At least one window in said structure lies within a generally parabolic trough surface. The window can both transmit and reflect solar energy. A heat collector is positioned along the parabolic focus of the window. Solar energy is transmitted through the window to provide instantaneous heating of greenhouse and solar energy is stored after it is gathered at the collector for heating the greenhouse when direct solar energy is no longer available.
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