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  2. 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.

  3. Tolerance analysis - Wikipedia

    en.wikipedia.org/wiki/Tolerance_analysis

    Engineers analyze tolerances for the purpose of evaluating geometric dimensioning and tolerancing (GD&T). Methods include 2D tolerance stacks, 3D Monte Carlo simulations , and datum conversions. Tolerance stackups or tolerance stacks are used to describe the problem-solving process in mechanical engineering of calculating the effects of the ...

  4. Engineering drawing abbreviations and symbols - Wikipedia

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

    A material condition in GD&T. Means that a feature of size is at the limit of its size tolerance in the direction that leaves the least material on the part. Thus an internal feature of size (e.g., a hole) at its biggest diameter, or an external feature of size (e.g., a flange) at its smallest thickness. The GD&T symbol for LMC is a circled L.

  5. Datum reference - Wikipedia

    en.wikipedia.org/wiki/Datum_reference

    A typical datum reference frame is made up of three planes. For example, the three planes could be one "face side" and two "datum edges". These three planes are marked A, B and C, where A is the face side, B is the first datum edge, and C is the second datum edge. In this case, the datum reference frame is A/B/C.

  6. Category:Medical symptoms and signs templates - Wikipedia

    en.wikipedia.org/wiki/Category:Medical_symptoms...

    [[Category:Medical symptoms and signs templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:Medical symptoms and signs templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.

  7. Occupational asthma - Wikipedia

    en.wikipedia.org/wiki/Occupational_asthma

    Removal from exposure may improve lung function when compared to continued exposure. Removal from exposure may improve symptoms and lung function more than reduction of exposure among patients exposed to low molecular weight agents, such as isocyanates, diisocyanates, plicatic acid, metals and anhydrides. Two studies reported an increase of job ...

  8. List of abbreviations for diseases and disorders - Wikipedia

    en.wikipedia.org/wiki/List_of_abbreviations_for...

    GD Gestational diabetes: GERD Gastroesophageal reflux disease: GI Gastrointestinal: GIB Gastrointestinal bleeding: GN Glossopharyngeal neuralgia: GORD Gastro-oesophageal reflux disease: GSS disease Gerstmann–Sträussler–Scheinker disease: GT/LD Gifted and learning disabled: GVHD Graft-versus-host disease: GWD Guinea worm disease

  9. Diffuse alveolar damage - Wikipedia

    en.wikipedia.org/wiki/Diffuse_alveolar_damage

    Diffuse alveolar damage (DAD): an acute lung condition with the presence of hyaline membranes. [2] These hyaline membranes are made up of dead cells, surfactant , and proteins. [ 1 ] The hyaline membranes deposit along the walls of the alveoli, where gas exchange typically occurs, thereby making gas exchange difficult.