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  2. CAD standards - Wikipedia

    en.wikipedia.org/wiki/CAD_standards

    Line thickness in mm Color Codes Out Line 0.20 or 0.25 White, Cyan, Yellow, Blue Hidden Line 0.00 or 0.05 Blue, Gray, 241 Center Line 0.10 or 0.15 Green, Red, Blue Note 0.18 or 0.20 White, Cyan, Green, 41 Thin Line 0.00 or 0.05 Gray, 08, 111 Reference Line 0.000 Magenta, Gray Hatch Line 0.000 Magenta, Green, Gray, red Color-9 to 256 0.000 ...

  3. List of dimensionless quantities - Wikipedia

    en.wikipedia.org/wiki/List_of_dimensionless...

    Print/export Download as PDF; Printable version; In other projects ... boundary layer flow (ratio of displacement thickness to momentum thickness) Sherwood number: Sh

  4. ISO 13567 - Wikipedia

    en.wikipedia.org/wiki/ISO_13567

    The standard is divided into three parts: ISO 13567-1:2017 [1] Technical product documentation — Organization and naming of layers for CAD — Part 1: Overview and principles

  5. Technical lettering - Wikipedia

    en.wikipedia.org/wiki/Technical_lettering

    Central Line is the imaginary line in the middle of each line or line element which is a constitutive part of a graphic character set. If we consider d as the width of the line element and h as the height of the line element, then the two standard ratios for d/h are: 1/14 and 1/10, which are feasible because they result in a minimum number of ...

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  7. Engineering drawing abbreviations and symbols - Wikipedia

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

    1. Center line, the central axis of a feature. 2. Class, for example, "paint per spec XYZ revision C type 1 class 2" may be abbreviated as "paint per spec XYZ REV C TY 1 CL 2" or even in some cases "paint per spec XYZ-C-1-2". (The latter practice is not uncommon but is cryptic for workers with minimal training and experience. The first two ...

  8. Nominal Pipe Size - Wikipedia

    en.wikipedia.org/wiki/Nominal_Pipe_Size

    Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...

  9. Use This Age Chart to Date Your Vintage Ball Mason Jars - AOL

    www.aol.com/age-chart-date-vintage-ball...

    Mason jars were manufactured in many different colors, including clear, pale blue, yellow, amber, olive and various other greens. (In the early 1900s, people thought darker glass helped prevent ...