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  2. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    The [main] field of the drawing, as opposed to other areas of it, such as the parts list , general notes (G/N), flagnotes , title block , rev block , bill of materials (B/M or BoM or BOM), or list of materials . Rationales for drawing changes that are noted in the rev block often use these abbreviations for brevity (e.g., "DIM 14.00 was 12.50 ...

  3. CAD standards - Wikipedia

    en.wikipedia.org/wiki/CAD_standards

    Center Line 0.10 or 0.15 Green, Red, Blue ... ASME Y14.41-2012 is based upon ASME Y14.5-2009 symbols and definition ... AutoCAD Layer Names for Architecture ...

  4. Block Elements - Wikipedia

    en.wikipedia.org/wiki/Block_Elements

    Block Elements is a Unicode block containing square block symbols of various fill and shading. Used along with block elements are box-drawing characters , shade characters, and terminal graphic characters.

  5. Engineering drawing - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing

    Most engineering drawings are language-independent—words are confined to the title block; symbols are used in place of words elsewhere. [18] With the advent of computer generated drawings for manufacturing and machining, many symbols have fallen out of common use.

  6. Datum reference - Wikipedia

    en.wikipedia.org/wiki/Datum_reference

    Screenshot from AutoCAD with various geometric dimensioning and tolerancing datum reference symbols (total indicator reading, perpendicularity, and parallelism. An engineering datum used in geometric dimensioning and tolerancing is a feature on an object used to create a reference system for measurement. [1]

  7. Box-drawing characters - Wikipedia

    en.wikipedia.org/wiki/Box-drawing_characters

    Some recent embedded systems also use proprietary character sets, usually extensions to ISO 8859 character sets, which include box-drawing characters or other special symbols. Other types of box-drawing characters are block elements , shade characters, and terminal graphic characters; these can be used for filling regions of the screen and ...

  8. Geometric dimensioning and tolerancing - Wikipedia

    en.wikipedia.org/wiki/Geometric_dimensioning_and...

    Example of true position geometric control defined by basic dimensions and datum features. Geometric dimensioning and tolerancing (GD&T) is a system for defining and communicating engineering tolerances via a symbolic language on engineering drawings and computer-generated 3D models that describes a physical object's nominal geometry and the permissible variation thereof.

  9. Center line - Wikipedia

    en.wikipedia.org/wiki/Centerline

    Center line, a road surface marking; Center line, a taxiway marking; Center line, a runway marking; CenterLine (OCTA), failed light-rail project in Orange County, California, U.S. Centerline (nautical), the dividing line between port and starboard sides of a ship or boat; Centreline, a bus service in Manchester, England, later rebranded ...