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2. Scroll - Wikipedia

   en.wikipedia.org/wiki/Scroll

   A scroll is usually partitioned into pages, which are sometimes separate sheets of papyrus or parchment glued together at the edges. Scrolls may be marked divisions of a continuous roll of writing material. The scroll is usually unrolled so that one page is exposed at a time, for writing or reading, with the remaining pages rolled and stowed to ...

3. T-square - Wikipedia

   en.wikipedia.org/wiki/T-square

   A T-square is a technical drawing instrument used by draftsmen primarily as a guide for drawing horizontal lines on a drafting table. The instrument is named after its resemblance to the letter T, with a long shaft called the "blade" and a short shaft called the "stock" or "head". T-squares are available in a range of sizes, with common lengths ...

4. French catheter scale - Wikipedia

   en.wikipedia.org/wiki/French_catheter_scale

   The Charrière is measured by the ''outer'' diameter, and is defined as 1 Fr = 1/3 mm, and thus 1 mm = 3 Fr; therefore the diameter of a round catheter in millimetres can be determined by dividing the French size by 3. [2] The French units roughly correspond to the outer circumference of the catheter (see table below).

5. Admonitions Scroll - Wikipedia

   en.wikipedia.org/wiki/Admonitions_Scroll

   The Admonitions Scroll is a Chinese narrative painting on silk that is traditionally ascribed to Gu Kaizhi ( ca. 345 – ca. 406), but which modern scholarship regards as a 5th to 8th century work that may or may not be a copy of an original Jin dynasty (266–420) court painting by Gu. The full title of the painting is Admonitions of the Court ...

6. Slide rule - Wikipedia

   en.wikipedia.org/wiki/Slide_rule

   For example, a 10 cm (3.9 in) circular would have a maximum precision approximately equal to a 31.4 cm (12.4 in) ordinary slide rule. Circular slide rules also eliminate "off-scale" calculations, because the scales were designed to "wrap around"; they never have to be reoriented when results are near 1.0—the rule is always on scale.

7. History of scrolls - Wikipedia

   en.wikipedia.org/wiki/History_of_scrolls

   A scroll (from the Old French escroe or escroue) is a roll of papyrus, parchment, or paper containing writing. [ 1] The history of scrolls dates back to ancient Egypt. In most ancient literate cultures scrolls were the earliest format for longer documents written in ink or paint on a flexible background, preceding bound books; [ 2] rigid media ...