| 摘要 |
A shutter includes a frame with frame members that are spaced apart from one another, and a series of louvers are respectively rotatably mounted to the frame members. At least one of the frame members includes a casing defining a cavity. A controller, which preferably includes a rack and pinion system, is at least partially positioned in the cavity for synchronously pivoting the louvers. A housing of the controller is preferably an extrusion that reinforces the casing.
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