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2. Hartzell Propeller - Wikipedia

   en.wikipedia.org/wiki/Hartzell_Propeller

   Hartzell introduced "Top-Prop" replacement propellers for piston-engine aircraft in 1991 and sold 20,000 Top-Prop conversion kits through 2013. [ 14 ] In 1994, the company held the first Friends of Hartzell Air Show in Piqua, Ohio [ 15 ] for which Hartzell developed its first aerobatic system.

3. Picture frame - Wikipedia

   en.wikipedia.org/wiki/Picture_frame

   View of a frame-maker's workshop, oil on canvas, circa 1900 The elaborate decoration on this frame may be made by adhering molded plaster pieces to the wood base.. A picture frame is a container that borders the perimeter of a picture, and is used for the protection, display, and visual appreciation of objects and imagery such as photographs, canvas paintings, drawings and prints, posters ...

4. Overhead projector - Wikipedia

   en.wikipedia.org/wiki/Overhead_projector

   These transparent sheets are placed on the glass platen of the projector, which has a light source below it and a projecting mirror and lens assembly above it (hence, "overhead"). They were widely used in education and business before the advent of video projectors .

5. AOL

   search.aol.com

   The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.

6. Poly(methyl methacrylate) - Wikipedia

   en.wikipedia.org/wiki/Poly(methyl_methacrylate)

   PMMA is also known as acrylic, acrylic glass, as well as by the trade names and brands Crylux, Hesalite, Plexiglas, Acrylite, Lucite, and Perspex, among several others . This plastic is often used in sheet form as a lightweight or shatter-resistant alternative to glass. It can also be used as a casting resin, in inks and coatings, and for many ...

7. Color gel - Wikipedia

   en.wikipedia.org/wiki/Color_gel

   The size originates from the gelatin days: it is the same as a standard baker's sheet, which was used to cast the sheets. In the film industry, gels are usually cut straight from rolls 24 or 48 in (600 or 1,200 mm) wide and 50 ft (15 m) long, as the size required may vary from a single practical halogen spotlight in a ceiling to a whole window.