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  2. Bed (geology) - Wikipedia

    en.wikipedia.org/wiki/Bed_(geology)

    In geology, a bed is a layer of sediment, sedimentary rock, or volcanic rock "bounded above and below by more or less well-defined bedding surfaces". [1] A bedding surface or bedding plane is respectively a curved surface or plane that visibly separates each successive bed (of the same or different lithology) from the

  3. Reference dimension - Wikipedia

    en.wikipedia.org/wiki/Reference_Dimension

    As an example, a distance of 1500 millimeters might be denoted by (1500 mm) instead of 1500 mm REF. This implementation has followed in modern CAD software that makes use of parentheses as the default denotation method whenever reference dimensions are "automatically" created by the software. The method for identifying a reference dimension (or ...

  4. CAD standards - Wikipedia

    en.wikipedia.org/wiki/CAD_standards

    Thickness for pens and plot: 0.13 mm Gray, 0.18 mm Red, 0.25 mm White, 0.35 mm Yellow, 0.50 mm Magenta, 0.70 mm Blue, 1.00 mm Green. In AutoCAD usually parts to be printed in black are drawn in 1 to 7 basic colors. Color layer: Green-Center, Magenta-Measure of length, and Blue-Hidden.

  5. 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 ...

  6. Engineering drawing - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing

    The stroke thickness is related to the character height (for example, 2.5 mm high characters would have a stroke thickness - pen nib size - of 0.25 mm, 3.5 would use a 0.35 mm pen and so forth).

  7. List of abbreviations in oil and gas exploration and production

    en.wikipedia.org/wiki/List_of_abbreviations_in...

    CBM – coal-bed methane; CCHT – core chart log; CCL – casing collar locator (in perforation or completion operations, the tool provides depths by correlation of the casing string's magnetic anomaly with known casing features) CCLBD – construction / commissioning logic block diagram; CCLP – casing collar locator perforation

  8. Compressed earth block - Wikipedia

    en.wikipedia.org/wiki/Compressed_earth_block

    Standards for foundations are similar to those for brick walls. A CEB wall is heavy. Footings must be at least 10 inches thick, with a minimum width that is 33 percent greater than the wall width. If a stem wall is used, it should extend to an elevation not less than eight inches (200 mm) above the exterior finish grade.

  9. Intermodal container - Wikipedia

    en.wikipedia.org/wiki/Intermodal_container

    Having a typical internal width of 2.44 m (96 + 1 ⁄ 8 in), [89] (a gain of ~ 10 centimetres (3 + 15 ⁄ 16 in) over the ISO-usual 2.34 m (92 + 1 ⁄ 8 in), [90] gives pallet-wide containers a usable internal floor width of 2.40 m (94 + 1 ⁄ 2 in), compared to 2.00 m (78 + 3 ⁄ 4 in) in standard containers, because the extra width enables ...