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An auto limit equipment to descending and ascending of a fire prevention shutter
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Fireproof shutter with a fire exut
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Fireproof shutter for elevator
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Fire prevention shutter which emergency door having lock function is opened in out and in side
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KR20070029928A
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Medium limit controller for lifting a fire shutter
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A controller of lifting a fire shutter
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A hinge for a screen shutter
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A shutter for screen
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Shutter for building
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Exit door strut of fire prevention shutter
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A dropping prevention hinge for emergency door of fireproof shutter
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DC automatic closing machine of fire shutter with DC motor
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