| 摘要 |
A roof support structure for a flexible roof for a greenhouse is disclosed. The roof support structure comprises an adjustable roof retention portion and a fixed roof retention portion. At least the adjustable roof retention portion is movable between an initial position and at least one adjusted position, wherein the distance between the two roof retention portions, when the adjustable roof retention portion is in any of the adjusted positions, is different from the distance between the two roof retention portions when the adjustable roof retention portion is in the initial position.
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