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Create in this day and registered in the Register of Commerce and Companies DN CLOSURE is positioned as one of the SMEs in the industrial sector. repondents its services to complex major structures such as industrial sites, hospitals shopping malls and even major housing projects. DN CLOSING performs for you work such as installation, maintenance and troubleshooting of the closure members industrial automatic doors PVC doors and windows, WOOD, aluminum metal shutters sectional doors automatic barriers of video and audio porters, bells of access controls and alarms .... small masonry locksmiths metalworkers free quote.