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Video door entry consists of both outside and indoor elements: an outdoor panel on the outside, an electronic lock release, and an indoor monitor. The outdoor panel or street panel is installed beside the entrance door or gateway and incorporates different elements ready for use in any climate conditions: one or several pushbuttons to make the call (usually one per home or apartment), a micro ...
Rollscreen. This is a relatively new hybrid of the full view and ventilating storm doors. The screen is connected at the top of the storm door's window, and when not in use it automatically rolls up on a tensioned dowel in the top of the door. This gives a full-view door when the screen is not in use, and a ventilating door when it is.
A sliding glass door, sometimes called an Arcadia door or patio door, is a door made of glass that slides open and sometimes has a screen (a removable metal mesh that covers the door). Australian doors are a pair of plywood swinging doors often found in Australian public houses.
Half-height platform edge doors, also known as automatic platform gates, are cheaper to install than full-height platform screen doors, which require more metallic framework for support. Some railway operators may therefore prefer such an option to improve safety at railway platforms and, at the same time, keep costs low and non-air-conditioned ...
A building project in Wuhan, China, demonstrating the relationship between the inner load-bearing structure and an exterior glass curtain wall Curtain walls are also used on residential structures A curtain wall is an exterior covering of a building in which the outer walls are non-structural, instead serving to protect the interior of the ...
The Lamborghini Aventador The Lamborghini Countach. Scissor doors (also called flap doors, wing doors, beetle-wing doors, turtle doors, switchblade doors, swing-up doors, upswing doors, Lamborghini doors, [1] and Lambo doors) are automobile doors that rotate vertically at a fixed hinge at the front of the door, [2] rather than outward as with a conventional door.
The exterior derivative is defined to be the unique ℝ-linear mapping from k-forms to (k + 1)-forms that has the following properties: The operator d {\displaystyle d} applied to the 0 {\displaystyle 0} -form f {\displaystyle f} is the differential d f {\displaystyle df} of f {\displaystyle f}