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  2. Crash bar - Wikipedia

    en.wikipedia.org/wiki/Crash_bar

    Crash bar doors in a school, with upper vertical rod latches. A crash bar (also known as a panic exit device, panic bar, or bump bar) [1] [2] is a type of door opening mechanism which allows users to open a door by pushing a bar.

  3. Door breaching - Wikipedia

    en.wikipedia.org/wiki/Door_breaching

    Utilizing a breaching tool is unnecessary if the door is unlocked and easy to open. [5] [3] [6] [1] If the door is locked, breachers can attempt to force inward-opening doors with a strong kick. The breacher will aim to hit the door near the locking mechanism, but not kick the doorknob itself as one can easily twist an ankle doing so. [7]

  4. Register (air and heating) - Wikipedia

    en.wikipedia.org/wiki/Register_(air_and_heating)

    Usually, a register is placed near a window or door, which is where the greatest heat/cooling loss occurs. [ 4 ] [ 5 ] In contrast, returns (grilled ducts which suck air back into the HVAC system for heating or cooling) are usually placed in the wall or ceiling nearest the center of the building.

  5. Stack effect - Wikipedia

    en.wikipedia.org/wiki/Stack_effect

    The rising warm air reduces the pressure in the base of the building, drawing cold air in through either open doors, windows, or other openings and leakage. During the cooling season, the stack effect is reversed, but is typically weaker due to lower temperature differences.

  6. 15 Easy Appetizers You Can Make Ahead of Christmas Day - AOL

    www.aol.com/15-easy-appetizers-ahead-christmas...

    Shrimp Dip. Whip up this nostalgic dip the day before and refrigerate it overnight. All you'll need to do is add a layer of cocktail sauce and a side of crackers for dipping.

  7. Pete Hegseth controversy explained: What to know amid ... - AOL

    www.aol.com/pete-hegseth-controversy-explained...

    She later told police she didn't know how she ended up in Hegseth's room, but she remembered he blocked the door and took her phone, she told police. Hegseth told police at the time he was "buzzed ...

  8. Failed ATM robbers crash truck into Walgreens storefront ...

    www.aol.com/news/failed-atm-robbers-crash-truck...

    The attempted robbery took place just before 5 a.m. on Dec. 9, according to ABC News' Washington affiliate KOMO. It involved a flatbed truck backing into and shattering the front windows of the ...

  9. Combustion chamber - Wikipedia

    en.wikipedia.org/wiki/Combustion_chamber

    IOE engines combine elements of overhead valve and flathead engines; the intake valve is located above the combustion chamber, while the exhaust valve is located below it. The shape of the combustion chamber, intake ports and exhaust ports are key to achieving efficient combustion and maximising power output.