| 摘要 |
A greenhouse structure (No. 1 or No. 2) having a curved roof wall formed of two spaced-apart plastic layers (30 and 34) with troughs (32) at the lower sides thereof, and a circulation system including blowers (42,42') connecting the top of the wall and the ends of the troughs to an insulation storage receptacle (A) by means of ducts (38, 39, 40, 41, 43 and 44), whereby the roof wall chamber is selectively filled and emptied.
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