| 摘要 |
A shutter having a unitary frame formed by four perimeter rails, each having a receptacle at each of its distal ends, with four connection members, each having structure inserted into and secured within one receptacle of each of two of the perimeter rails. Optionally, a latch pin is movable through a guide hole formed in one of the corner connection members. A further option is louvers extending through a center support.
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