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2. Dihedral synchro-helix actuation doors - Wikipedia

   en.wikipedia.org/wiki/Dihedral_Synchro-Helix...

   The dihedral synchro-helix actuation door system is a type of door with a hinge mechanism which allows the doors to rotate 90° by sweeping outwards and upwards at the hinge. [1] It was designed and developed by Christian von Koenigsegg on behalf of high-performance sports cars manufacturer, Koenigsegg Automotive AB. [2]

3. Door closer - Wikipedia

   en.wikipedia.org/wiki/Door_closer

   An automatic door closer, more often called a "door opener", opens the door itself, typically under the control of a push button, motion detector or other device, and then uses a motion sensor or proximity detector to determine when it is safe to close it.

4. Car door - Wikipedia

   en.wikipedia.org/wiki/Car_door

   Open doors on a Chrysler Airflow. Car doors are designed to facilitate ingress and egress by car passengers. [1]Unlike other types of doors, the exterior side of the vehicle door contrasts in its design and finish from its interior side (the interior part is typically equipped with a door card (in British English) or a door panel (in American English) that has decorative and functional features.

5. Automatic door - Wikipedia

   en.wikipedia.org/wiki/Automatic_door

   In 1954, Dee Horton and Lew Hewitt invented the first sliding automatic door. The automatic door used a mat actuator. In 1960, they co-founded Horton Automatics Inc and placed the first commercial automatic sliding door on the market. [5] With the invention of the Gunn diode, microwave motion detectors became common in automatic doors in the 1970s.

6. Hinge - Wikipedia

   en.wikipedia.org/wiki/Hinge

   Doors with these hinges may be called haar-hung doors. Self-closing hinge This is a spring-loaded hinge with a speed control function. The same as spring hinge, usually use spring to provide force to close the door and provide a mechanical or hydraulic damper to control door close speed. That can prevent door slamming problem while auto closes ...

7. Why You Should Always Close the Interior Doors in Your Home ...

   www.aol.com/lifestyle/why-always-close-interior...

   Closing all interior doors helps disperse the pressure throughout your home, reducing the effect that all of that force can have on your roof — basically the one thing that separates you from ...