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Technical drawing, drafting or drawing, is the act and discipline of composing drawings that visually communicate how something functions or is constructed. Technical drawing is essential for communicating ideas in industry and engineering .
Engineering Drawing by Thomas Ewing French (1871-1944), Mech. Eng., OSU 1895, also known as A Manual of Engineering Drawing for Students and Draftsman, was first published in 1911 by McGraw-Hill Book Company. It appeared in fourteen editions and was last published in 1993. The title and author remained the same through the first six editions.
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The issuance of a drawing from the engineering/design activity to the production activity. In other words, the event when a draft becomes a completed, official document. A stamp on the drawing saying "ISSUED" documents that RTP has occurred. RTV: room-temperature vulcanizing; return to vendor: 1. RTV sealants, a way to seal joints. 2.
English: Placement of projections in technical drawings. A truncated cone is illustrated. ISO standard (left) is a "First angle projection". To the right a "Third angel projection" common in the US, Canada, UK.
The English idiom "to go back to the drawing board", which is a figurative phrase meaning to rethink something altogether, was inspired by the literal act of discovering design errors during production and returning to a drawing board to revise the engineering drawing.
A drawing board was used to hold the drawing media in place; later boards included drafting machines that sped the layout of straight lines and angles. Tools such as templates and lettering guides assisted in the drawing of repetitive elements such as circles, ellipses, schematic symbols and text.