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2. Cost estimate - Wikipedia

   en.wikipedia.org/wiki/Cost_estimate

   A cost estimate is the approximation of the cost of a program, project, or operation. The cost estimate is the product of the cost estimating process. The cost estimate has a single total value and may have identifiable component values. A problem with a cost overrun can be avoided with a credible, reliable, and accurate cost estimate. A cost ...

3. Door handle - Wikipedia

   en.wikipedia.org/wiki/Door_handle

   This is an accepted version of this page This is the latest accepted revision, reviewed on 5 February 2025. Device to open or close door Various examples of door handles throughout history A door handle or doorknob is a handle used to open or close a door. Door handles can be found on all types of doors including: exterior doors of residential and commercial buildings, internal doors, cupboard ...

4. Window handle - Wikipedia

   en.wikipedia.org/wiki/Window_handle

   Espag window handles – has a mental spindle on the back which is attached to the window frame, driving the window mechanism. The spindle is always fixed in position to allow for a firm and secure fixture. Cockspur window handles – are typically fixed by three or four screws which are installed directly into the window’s opening.

5. Window - Wikipedia

   en.wikipedia.org/wiki/Window

   A window is an opening in a wall, door, roof, or vehicle that allows the exchange of light and may also allow the passage of sound and sometimes air.Modern windows are usually glazed or covered in some other transparent or translucent material, a sash set in a frame [1] in the opening; the sash and frame are also referred to as a window. [2]

6. Door - Wikipedia

   en.wikipedia.org/wiki/Door

   A pet door (also known as a cat flap or dog door) is an opening in a door to allow pets to enter and exit without the main door's being opened. It may be simply covered by a rubber flap, or it may be an actual door hinged on the top that the pet can push through.

7. Door handle bacteria - Wikipedia

   en.wikipedia.org/wiki/Door_handle_bacteria

   Automatic door handle sanitisers are used mainly in hospitals. These units spray a tiny amount of sanitiser onto the door handle after each use. [citation needed] Automatic doors are also becoming more and more popular in hospitals, chemists and other public buildings due to them reducing the risk of cross-contamination since there is no need ...