FIREPROOF STRUCTURE FOR GUIDE RAIL FOR WINDOW SHUTTER
PROBLEM TO BE SOLVED: To provide a window shutter with improved fireproof performance of a guide rail structure.SOLUTION: In a guide space G formed between a first side 30 on a side closer to an outer wall and a second side 31 of a guide rail 3, a reinforcement plate formed of a material having a me...
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Format: | Patent |
Sprache: | eng ; jpn |
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