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  2. File:Form 1040 (2021).pdf - Wikipedia

    en.wikipedia.org/wiki/File:Form_1040_(2021).pdf

    English: This is the 2021 version of the form used to file personal income taxes in the United States. Date: 1 January 2022: Source: ... 2021 Form 1040; Software used:

  3. Air door - Wikipedia

    en.wikipedia.org/wiki/Air_door

    A typical commercial air curtain enclosure. In North America, the more commonly-used term for an air door is "air curtain". The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) defines an air door as follows: "In its simplest application, an air curtain is a continuous broad stream of air circulated across a doorway of a conditioned space.

  4. IRS tax forms - Wikipedia

    en.wikipedia.org/wiki/IRS_tax_forms

    As of the 2018 tax year, Form 1040, U.S. Individual Income Tax Return, is the only form used for personal (individual) federal income tax returns filed with the IRS. In prior years, it had been one of three forms (1040 [the "Long Form"], 1040A [the "Short Form"] and 1040EZ – see below for explanations of each) used for such returns.

  5. Form 1040 - Wikipedia

    en.wikipedia.org/wiki/Form_1040

    Form 1040-X (officially, the "Amended U.S. Individual Tax Return") is used to make corrections on Form 1040, Form 1040A, and Form 1040EZ tax returns that have been previously filed (note: forms 1040-A and 1040-EZ were discontinued starting with tax year 2018, but a 1040X may still be filed amending one of these tax forms filed for previous years).

  6. Curtain wall (architecture) - Wikipedia

    en.wikipedia.org/wiki/Curtain_wall_(architecture)

    The curtain wall itself, however, is not ordinarily required to have a rating. This causes a quandary as compartmentalization (fire protection) is typically based upon closed compartments to avoid fire and smoke migrations beyond each engaged compartment. A curtain wall by its very nature prevents the completion of the compartment (or envelope).

  7. Pneumatic barrier - Wikipedia

    en.wikipedia.org/wiki/Pneumatic_barrier

    Air curtains may have another application. Dolphin and whale beaching has increased with the rise in ocean temperatures. On Thursday February 12th, 2017, a group of nearly 400 whales beached near Golden Bay on the tip of New Zealand’s South Island, following a similar incident earlier that week.

  8. Safety curtain - Wikipedia

    en.wikipedia.org/wiki/Safety_curtain

    A safety curtain is required per United States building codes if the proscenium wall is required to be fire rated. [1] The curtain is required to demonstrate a fire rating of approximately 30 min per testing. [2] In the UK, it is a requirement that a safety curtain must be fully down within the proscenium opening within 30 seconds of being ...

  9. Steel Curtain (roller coaster) - Wikipedia

    en.wikipedia.org/wiki/Steel_Curtain_(roller_coaster)

    Steel Curtain is a steel hypercoaster at Kennywood in West Mifflin, Pennsylvania, United States.Manufactured by S&S – Sansei Technologies, the coaster reaches a height of 220 feet (67 m) and features either eight or nine inversions, [a] including a 197-foot (60 m) corkscrew considered to be the world's tallest inversion.

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