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A sliding door operator (or sliding door opener or automatic sliding door operator) is a device that operates a sliding door for pedestrian use. It opens the door automatically, waits, then closes it. Sliding door with opener at the Overloon War Museum, Netherlands
Driveway gate openers can be the rollback (sliding) type that retracks a gate along the fence or wall on wheels or bearing, or the swing type that draws the gate open or closed on hinges. They are usually operated by a remote controller or a sensor
Permanently engaged—the motor driven mechanism (the opener portion) is always joined to the closer (if present) and to the door. When opening the door manually, the user is also driving the opener portion, so the opening is rough and noisy. Electro-hydraulic types are inherently quiet and smooth during manual opening, as the motor and pump ...
Simple remote control systems use a fixed code word; the code word that opens the gate today will also open the gate tomorrow. An attacker with an appropriate receiver could discover the code word and use it to gain access sometime later. More sophisticated remote control systems use a rolling code (or hopping code) that changes for every use.
National votes for Labour at general elections since 1992 (millions) England Wales Scotland 2.5 5 7.5 10 12.5 15 1992 1997 2001 2005 2010 2015 2017 2019 2024 A graph showing the percentage of the popular vote received by major parties in general elections (1832–2005), with the rapid rise of the Labour Party after its founding during the late 19th century being clear as it became one of the ...
The Douglas DC-6 is a piston-powered airliner and cargo aircraft built by the Douglas Aircraft Company from 1946 to 1958. Originally intended as a military transport near the end of World War II, Douglas reworked it after the war to compete with the Lockheed Constellation in the long-range commercial transport market.
The wing area would increase by 56 m 2 (600 sq ft) to 420 m 2 (4,500 sq ft) through a larger chord needing a three-frame centre fuselage insert and retaining the existing front and rear spars, and a span increased by 3.5 to 63.8 m (11 to 209 ft), alongside a 25% increase in wing fuel capacity and four wheels replacing the centre twin-wheel ...