| 摘要 |
The greenhouse frame includes columns, joists, gutters and several standard size movable cloth frames, each connected to a screen. Frames and screens are connected via a slip coupling to a drive motor unit. A fixed cloth ring (9) is connected via a strip (10) to a U-shaped beam (10) and joist (3). A movable cloth rim (12) is fixed to a U-shaped cloth frame (13) which via an elastic flap (14) in the vertical closed position, contacts a beam (11). The unit is motor driven and includes a spring-loaded slip coupling.
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