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2. Poly(methyl methacrylate) - Wikipedia

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

   The polymer separated from the glass as a clear plastic sheet, which Röhm gave the trademarked name Plexiglas in 1933. [5] Both Perspex and Plexiglas were commercialized in the late 1930s. In the United States, E.I. du Pont de Nemours & Company (now DuPont Company) subsequently introduced its own product under the trademark Lucite.

3. Plywood - Wikipedia

   en.wikipedia.org/wiki/Plywood

   The most common dimension is 1.2 by 2.4 metres (3 ft 11 in × 7 ft 10 in) or the slightly larger imperial dimension of 4 feet × 8 feet. Plies vary in thickness from 1.4 mm to 4.3 mm. The number of plies—which is always odd—depends on the thickness and grade of the sheet. Roofing can use the thinner 16-millimetre (5 ⁄ 8 in

4. Q - Wikipedia

   en.wikipedia.org/wiki/Q

   Time period: Unknown to present: Descendants • Ƣ Sisters: Φ Ф ק ق ܩ ࠒ 𐎖 ቀ Փ փ Ֆ ֆ: Other; Associated graphs: q(x) Writing direction: Left-to-right: This article contains phonetic transcriptions in the International Phonetic Alphabet (IPA).