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2. Electromagnetic lock - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_lock

   Operation. The principle behind an electromagnetic lock is the use of electromagnetism to lock a door when energized. The holding force should be collinear with the load, and the lock and armature plate should be face-to-face to achieve optimal operation. The magnetic lock relies upon some of the basic concepts of electromagnetism.

3. RVmagnetics - Wikipedia

   en.wikipedia.org/wiki/RVmagnetics

   RVmagnetics. RVmagnetics, a. s. is a research and development company based in Slovakia that specializes in manufacturing and customisation of contactless MicroWire based sensor technology for the industry 4.0, medical and biomedical technologies, electric motors, composites, construction and civil engineering, transportation and logistics.

4. Electromagnetic door holder - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_door_holder

   An electromagnetic door holder (electromagnetic door holder and release or hold-open device, sometimes informally called a mag hold open or electric doorstop) is a simple electromechanical mechanism which can be used to hold a fire door or security door open until given a signal to release. A fire alarm control panel or a similar emergency ...

5. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

6. Emergency vehicle equipment - Wikipedia

   en.wikipedia.org/wiki/Emergency_vehicle_equipment

   Emergency vehicle equipment. An ambulance with two red revolving lights (beacons) mounted above two flashing red lights, with two speakers between for the vehicle's electronic siren. Also seen are two antennae; the one seen between the two speakers is for a two-way radio, while the one seen in front of the flashing light on the left is probably ...

7. Magnet - Wikipedia

   en.wikipedia.org/wiki/Magnet

   A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, steel, nickel, cobalt, etc. and attracts or repels other magnets. A permanent magnet is an object made from a material ...