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2. Copper in architecture - Wikipedia

   en.wikipedia.org/wiki/Copper_in_architecture

   Installation techniques such as prefabrication, in-situ machine forming, mechanized seaming, and the long-strip system help to reduce the installation costs of copper roofing. By lowering installation costs, these techniques permit designers to specify copper into a wider array of building types, not just large prestigious projects as had been ...

3. Building material - Wikipedia

   en.wikipedia.org/wiki/Building_material

   The initial energy costs include the amount of energy consumed to produce, deliver and install the material. The long term energy cost is the economic, ecological, and social costs of continuing to produce and deliver energy to the building for its use, maintenance, and eventual removal.

4. Mullion - Wikipedia

   en.wikipedia.org/wiki/Mullion

   A mullioned window in the church of San Francesco of Lodi, Lombardy. A mullion is a vertical element that forms a division between units of a window or screen, or is used decoratively. [1] It is also often used as a division between double doors. When dividing adjacent window units

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6. Electromagnetic lock - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_lock

   In order to provide the shear magnetic lock with the appropriate holding force, then two pins lock the armature onto the magnet itself, and ensure that the magnet locks into place. An improved "shear" electromagnetic lock was patented on May 2, 1989, by Arthur, Richard and David Geringer of Security Door Controls, an access control hardware ...

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9. Electromagnetic door holder - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_door_holder

   A simple electromagnetic door holder consists of a strong electromagnet, usually attached to a wall or mounted in a floor pedestal enclosure, next to the door it controls. The mechanism may be mounted near the floor, at the upper corner of the open door, or at any convenient height along the latch edge (away from the hinged edge).