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  2. Garage door - Wikipedia

    en.wikipedia.org/wiki/Garage_door

    Sectional garage door Up-and-over garage door Garage Door Hardware. A garage door is a large door to allow egress for a garage that opens either manually or by an electric motor (a garage door opener). Garage doors are frequently large enough to accommodate automobiles and other vehicles. The operating mechanism is usually spring-loaded or ...

  3. Garage door opener - Wikipedia

    en.wikipedia.org/wiki/Garage_door_opener

    The electric overhead garage door opener was invented by C.G. Johnson in 1926 in Hartford City, Indiana. [1] Electric Garage Door openers did not become popular until Era Meter Company of Chicago offered one after World War II where the overhead garage door could be opened via a key pad located on a post at the end of the driveway or a switch inside the garage.

  4. Automated parking system - Wikipedia

    en.wikipedia.org/wiki/Automated_parking_system

    The driver retrieves a car by inserting a ticket or code into an automated terminal. The APS lifts the car from its parking space and delivers it to an exit area. Most often, the retrieved car has been oriented to eliminate the need for the driver to back out. Fully automated APS theoretically eliminate the need for parking attendants.

  5. Attic ladder - Wikipedia

    en.wikipedia.org/wiki/Attic_ladder

    An attic ladder (US) or loft ladder (UK) is a retractable ladder that is installed into an attic door/access panel. They are used as an inexpensive and compact alternative to having a stairway that ascends to the attic of a building. They are useful in areas with space constraints that would hinder the installation of a standard staircase.

  6. Ladder logic - Wikipedia

    en.wikipedia.org/wiki/Ladder_logic

    Part of a ladder diagram, including contacts and coils, compares, timers and monostable multivibrators. Ladder logic is widely used to program PLCs, where sequential control of a process or manufacturing operation is required. Ladder logic is useful for simple but critical control systems or for reworking old hardwired relay circuits. As ...

  7. Ladder paradox - Wikipedia

    en.wikipedia.org/wiki/Ladder_paradox

    The garage is shown in light blue, the ladder in light red. The diagram is in the rest frame of the garage, with x and t being the garage space and time axes, respectively. The ladder frame is for a person sitting on the front of the ladder, with x ′ and t ′ being the ladder space and time axes respectively. The blue and red lines, AB and ...

  8. Autorack - Wikipedia

    en.wikipedia.org/wiki/Autorack

    Auto-rack train car carries automobiles Autorack terminal in New Richmond, Wisconsin [1] A modern German autorack similar to the original design with a full load of automobiles An autorack , also known as an auto carrier (also car transporter outside the US), is a specialized piece of railroad rolling stock used to transport automobiles and ...

  9. Chevrolet Tahoe - Wikipedia

    en.wikipedia.org/wiki/Chevrolet_Tahoe

    The 6.5-liter turbo diesel was only available in two-door 4WD models and was detuned to 360 lb⋅ft (488 N⋅m) torque considering the Tahoe's rear axle capacity. In Mexico, the two-door Tahoe was released in 1995, called the Chevrolet Silverado, and in 1998, the four-door model was released as the Silverado 4-door.

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