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  2. Mexican mask-folk art - Wikipedia

    en.wikipedia.org/wiki/Mexican_mask-folk_art

    Mexican mask-folk art refers to the making and use of masks for various traditional dances and ceremony in Mexico. Evidence of mask making in the region extends for thousands of years and was a well-established part of ritual life in the pre-Hispanic territories that are now Mexico well before the Spanish conquest of the Aztec Empire occurred.

  3. ISO 3864 - Wikipedia

    en.wikipedia.org/wiki/ISO_3864

    ISO 3864 consists of four parts, that provide more specific and situation specific guidance depending on the application. ISO 3864-1:2011 Part 1: Design principles for safety signs and safety markings [1]

  4. Solder mask - Wikipedia

    en.wikipedia.org/wiki/Solder_mask

    Solder mask, solder stop mask or solder resist is a thin lacquer-like layer of polymer that is usually applied to the copper traces of a printed circuit board (PCB) for protection against oxidation and to prevent solder bridges from forming between closely spaced solder pads.

  5. Face Mask for Coronavirus: Types, Best Filters, How to Make

    www.webmd.com/covid/coronavirus-face-masks

    Beginning in 2022, the U.S. government began distributing free N95 masks to local health centers, pharmacies, and other community partners. Although the program is more than 2 years old, some ...

  6. Death mask - Wikipedia

    en.wikipedia.org/wiki/Death_mask

    The death mask of 18th century sailor Richard Parker Golden funeral mask of Tutankhamun Posthumous portrait bust of Henry VII of England by Pietro Torrigiano, supposedly made using his death mask A death mask is a likeness (typically in wax or plaster cast ) of a person's face after their death , usually made by taking a cast or impression from ...

  7. Joint Service General Purpose Mask M-50/M-51 - Wikipedia

    en.wikipedia.org/wiki/Joint_Service_General...

    The lifetime ownership cost of the mask was reduced by 50% when compared with the M40 series mask due to a lower repair part count, all maintenance being completed at the operator and unit level and color coding of repair parts which decreased on-hand repair part inventory. [7] United States Marine Corps member is wearing a M50 mask

  8. Wikipedia:Route diagram template - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Route_diagram...

    This template displays a distance as two lines of text in a text field. The default input is miles, and the template calculates the kilometre equivalent. Inserting the optional second parameter (any character) reverses the units. Decimal values are supported. The template automatically adds the units "mi" and "km" after the values.

  9. Bahtinov mask - Wikipedia

    en.wikipedia.org/wiki/Bahtinov_mask

    This pattern normally would be an Airy disk resulting from a circular aperture, but with the mask in place, the pattern exhibits asymmetric spikes representing the transform of the mask pattern's spatial frequency and orientation. A very bright star and very dark sky are required to produce highly contrasted spikes that are clearly visible.

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