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Arindam Bhadra Fire Safety : Fire integration with Door Holder unit
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Patent US5197582 - Electric door opener for sliding doors - Google Patents
Arindam Bhadra Fire Safety : Fire integration with Door Holder unit
You Own the Door | 2012-10-12 | SDM Magazine
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Patent EP1887169B1 - Electric door opener - Google Patents
Patent US20070268132 - Door accessory power system - Google Patents
Patent US8528961 - Electric swing plug door operator with auxiliary
CAT-7905_MIR_Series_Electromagnetic_Fire_Door_Holders.pdf | Power
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