| 摘要 |
<p>The greenhouse or nursery hothouse has a superstructure erected above the roof to assist in energy conservation. It consists of a free-standing supporting framework, with a foil sheet stretched over it. The framework is made up from a series of curved shaped bars (10) made of stressed steel, with bottom ends fastened near the greenhouse, so that they can be detached. These ends can be sunk in the ground, and can be fastened to parts of the greenhouse by retaining elements (15). The greenhouse can have protruding supports (16) in the roof area, for detachably holding bars.</p> |
