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  2. Trap (printing) - Wikipedia

    en.wikipedia.org/wiki/Trap_(printing)

    Example use of a trap. Thinner traps are less visible. Therefore, the trap width is set to a strict minimum, dictated by the maximum amount of misregistration of the entire workflow up to the press. When printing at 150 lpi, traps are usually between 1/150 and 1/300 inch (0.48 pt and 0.24 pt, 0.16 mm and 0.08 mm). These values are usually ...

  3. Drain-waste-vent system - Wikipedia

    en.wikipedia.org/wiki/Drain-waste-vent_system

    A sewer pipe is normally at neutral air pressure compared to the surrounding atmosphere.When a column of waste water flows through a pipe, it compresses air ahead of it in the system, creating a positive pressure that must be released so it does not push back on the waste stream and downstream traps, slow drainage, and induce potential clogs.

  4. Trap (plumbing) - Wikipedia

    en.wikipedia.org/wiki/Trap_(plumbing)

    Water enters at right, fills the trap, and continues left. Inverted siphoning occurs below the line "A". Examples of traps [further explanation needed] In plumbing, a trap is a U-shaped portion of pipe designed to trap liquid or gas to prevent unwanted flow; most notably sewer gases from entering buildings while allowing waste materials to pass ...

  5. Bass trap - Wikipedia

    en.wikipedia.org/wiki/Bass_trap

    Since low frequency resonances in a room have their points of maximum or minimum pressure in the corners of the room, resonant bass traps mounted in these positions will be the most efficient, [3] while porous traps are most efficient at the points of high particle velocity such as 1/4 the desired wavelength away from the wall. [4] Bass traps ...

  6. What are Czech hedgehogs? Ukraine's surprisingly simple ... - AOL

    www.aol.com/news/czech-hedgehogs-ukraines...

    Ukraine's surprisingly simple antitank trap. Niamh Cavanagh. March 29, 2022 at 9:24 AM ... Czech hedgehogs in 1963 near the Berlin Wall at Potsdamer Platz. ... low-carb breakfast he loves — and ...

  7. Cold trap - Wikipedia

    en.wikipedia.org/wiki/Cold_trap

    Some workers prefer the opposite arrangement, where vapors flow down the wall of the trap, and are sucked up the inner tube; this reduces blockage. [ 1 ] In vacuum applications, a cold trap is a device that condenses all vapors except the permanent gases (hydrogen, oxygen, and nitrogen) into a liquid or solid.

  8. Sound attenuator - Wikipedia

    en.wikipedia.org/wiki/Sound_attenuator

    A sound attenuator, or duct silencer, sound trap, or muffler, is a noise control acoustical treatment of Heating Ventilating and Air-Conditioning (HVAC) ductwork designed to reduce transmission of noise through the ductwork, either from equipment into occupied spaces in a building, or between occupied spaces.

  9. AOL Mail

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!