| 摘要 |
A trickle ventilator for a conservatory roof to be sited between an eaves beam of the roof and a glazing panel extending over the eaves beam, the ventilator comprising an elongate body having a front and rear walls spaced apart, at least one aperture in each wall and a gate for selectively closing the or each aperture in the front wall to control airflow into or out of the conservatory.
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