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  2. Safety and security window film - Wikipedia

    en.wikipedia.org/.../Safety_and_security_window_film

    The film thickness is selected for level of protection desired and the dimensions of the glass pane. Manufacturers recommend 100 micrometer film (2 ply) for glass up to 3 mm (1/8 in) and 175 micrometer film for glass over 6 mm (1/4 in). These films can be applied for security applications, where a delay of forced entry is desired.

  3. Displaced threshold - Wikipedia

    en.wikipedia.org/wiki/Displaced_threshold

    A portion of the runway behind a displaced threshold has three markings: [1] White arrows along the center line of the runway; White arrow heads across the width of the runway just prior to the displaced threshold bar; A 10 feet (3.0 m) wide white threshold bar across the width of the runway at the displaced threshold

  4. Window film - Wikipedia

    en.wikipedia.org/wiki/Window_film

    Different kinds of sun protection film on a glass ceiling. A window film, sometimes called tint, is a thin laminate film that can be installed on the interior or exterior of glass surfaces in automobiles and boats, and as well as on the interior or exterior of glass in homes and buildings.

  5. Overton window - Wikipedia

    en.wikipedia.org/wiki/Overton_window

    It is also known as the window of discourse. The term is named after the American policy analyst and former senior vice president at Mackinac Center for Public Policy , Joseph Overton , who proposed that the political viability of an idea depends mainly on whether it falls within an acceptability range, rather than on the individual preferences ...

  6. Runway - Wikipedia

    en.wikipedia.org/wiki/Runway

    A displaced threshold often exists because of obstacles just before the runway, runway strength, or noise restrictions making the beginning section of runway unsuitable for landings. [30] It is marked with white paint arrows that lead up to the beginning of the landing portion of the runway.

  7. Threshold (architecture) - Wikipedia

    en.wikipedia.org/wiki/Threshold_(architecture)

    A worn-out wooden threshold. A threshold is the sill of a door. Some cultures attach special symbolism to a threshold. It is called a door saddle in New England. [citation needed] Door thresholds cover the gap between the floor and the door frame, helping to prevent any water leaks, insects or draughts from entering through the opening.