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Security roller shutters in a dead mall. A roller shutter, security shutter, coiling door, roller door or sectional overhead door is a specialized type of door or window shutter consisting of multiple horizontal slats, bars, or web systems interconnected through hinges. The mechanism involves lifting the door to open it and lowering it to close.
[12]: §3.5 The minimum sustained road speed was 60 mph (97 km/h) with a grade of up to 1% at an altitude of 3,000 ft (910 m) or less, [12]: §4.1, 4.3 with a minimum operating range of 70 mi (110 km) including 600 stops and starts [12]: §3.4 while using the heating and air conditioning systems and accessories at their maximum settings, [12 ...
High-speed doors are door systems, mainly used in industrial applications. They are technical enhancements of the generally known sectional doors, PVC fabric doors or roller shutters. The main difference is that the durable construction provides a higher operating speed and they are able to sustain a higher number of cycles (opening and closing ...
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] [7] In 1980, the first automatic door using an infrared sensor was ...
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 counterbalanced to offset the door's weight and reduce the human or ...
Nordstrom, Inc. Nordstrom, Inc. (/ ˈnɔːrdstrəm /) is an American luxury department store chain headquartered in Seattle, Washington, and founded by John W. Nordstrom and Carl F. Wallin in 1901. The original Wallin & Nordstrom store operated exclusively as a shoe store, and a second Nordstrom's shoe store opened in 1923.
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