SEPARATE-TYPE FIRE DOOR CLOSING APPARATUS FOR A DOOR CHECK
The present invention relates to a separate-type fire door closing apparatus for a door check, which operates in connection with the door check and is not integrally installed on the door check but rather installed separately from the door check to enable easy manufacture and installation. The separ...
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Main Author | |
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Format | Patent |
Language | English French Korean |
Published |
03.06.2010
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Subjects | |
Online Access | Get full text |
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