| 摘要 |
A vent assembly which can be mounted to plant nursery buildings of the type which include a plurality of arcuate roof frame members covered by a fabric material, such as a plastic film, the vent assembly having at least one pair of sawtooth profiled frames which may be bolted or otherwise connected to the building roof frame members to be upstanding therefrom. A pair of members extending longitudinally of the building are connected to upper and lower parts of the vertical portions of the sawtooth frames to define a vent opening which may be opened and closed by means of a rollerblind.
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