| 摘要 |
A register for controlling air flow to or-from a vent has a front with a grille for allowing full air flow. Plates within the register are movable over the vent opening to affect the air flow. The plates may include a louver to redirect the air flow, and an imperforate plate to diminish or stop air flow. Studs on the plates extend through the front member and receive knobs for controlling the movement of the plates. A register with only the imperforate plate can be used over the return vent.
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