| 摘要 |
A shutter which has a number of wide slats connected to each other by a hinge mechanism with the slats remaining separate so that an opening for a side gate can be formed at a desired position on the shutter. The slats of the side gate are connected vertically to each other or horizontally with other slats and the connection can be released at any time desired. The side gate provided at a part of the shutter allows access even when the shutter is closed, yet the side gate can be folded as a part of the shutter.
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