Many of the symbols and principles of technical drawing are codified in an international standard called ISO 128. Together, such conventions constitute a visual language and help to ensure that the drawing is unambiguous and relatively easy to understand.
To make the drawings easier to understand, people use familiar symbols, perspectives, units of measurement, notation systems, visual styles, and page layout.
Technical drawing is essential for communicating ideas in industry and engineering. Technical drawing, drafting or drawing, is the act and discipline of composing drawings that visually communicate how something functions or is constructed.
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