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  2. 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.

  3. Dry box - Wikipedia

    en.wikipedia.org/wiki/Dry_box

    However, the humidity level in such boxes cannot be controlled or regulated, owing to the difficulty of gauging the quantity of desiccant required to achieve a certain humidity level. Repeated opening of such boxes, allowing humid ambient air to enter, can saturate the desiccant, and some desiccants can have corrosive or other harmful effects ...

  4. Dust collector - Wikipedia

    en.wikipedia.org/wiki/Dust_collector

    Dust collectors are used in many processes to either recover valuable granular solid or powder from process streams, or to remove granular solid pollutants from exhaust gases prior to venting to the atmosphere. Dust collection is an online process for collecting any process-generated dust from the source point on a continuous basis.

  5. Rotary dryer - Wikipedia

    en.wikipedia.org/wiki/Rotary_dryer

    A rotary dryer is a type of industrial dryer used to reduce or minimize the moisture content of the material it is handling by bringing it into contact with a heated gas. [1] The dryer is made up of a rotating cylinder ("drum" or "shell"), a drive mechanism, and a support structure (commonly concrete posts or a steel frame).

  6. Falling weight deflectometer - Wikipedia

    en.wikipedia.org/wiki/Falling_weight_deflectometer

    FWD data is most often used to calculate stiffness-related parameters of a pavement structure. The process of calculating the elastic moduli of individual layers in a multi-layer system (e.g. asphalt concrete on top of a base course on top of the subgrade) based on surface deflections is known as "backcalculation", as there is no closed-form solution.

  7. Clothes dryer - Wikipedia

    en.wikipedia.org/wiki/Clothes_dryer

    An American style clothes dryer with a rear control panel A European style clothes dryer with a front control panel. A clothes dryer (tumble dryer, drying machine, or simply dryer) is a powered household appliance that is used to remove moisture from a load of clothing, bedding and other textiles, usually after they are washed in the washing machine.