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  2. System context diagram - Wikipedia

    en.wikipedia.org/wiki/System_context_diagram

    Example of a system context diagram. [1] A system context diagram in engineering is a diagram that defines the boundary between the system, or part of a system, and its environment, showing the entities that interact with it. [2] This diagram is a high level view of a system. It is similar to a block diagram.

  3. Backflow prevention device - Wikipedia

    en.wikipedia.org/wiki/Backflow_prevention_device

    In water distribution systems, water is normally maintained at a significant pressure to enable water to flow from the tap, shower, or other fixture. Water pressure may fail or be reduced when a water main bursts, pipes freeze, or there is unexpectedly high demand on the water system (for example, when several fire hydrants are opened). Reduced ...

  4. Improvised firearm - Wikipedia

    en.wikipedia.org/wiki/Improvised_firearm

    A zip gun constructed from a toy cap gun. The gun is capable of shooting a .22 caliber round. More advanced improvised guns can use parts from other gun-like products. One example is the cap gun. A cap gun can be disassembled, and a barrel added, turning the toy gun into a real one.

  5. Sewage treatment - Wikipedia

    en.wikipedia.org/wiki/Sewage_treatment

    The term sewage treatment plant (STP) (or sewage treatment works) is nowadays often replaced with the term wastewater treatment plant (WWTP). [7] [8] Strictly speaking, the latter is a broader term that can also refer to industrial wastewater treatment. The terms water recycling center or water reclamation plants are also in use as synonyms.

  6. Which drinking water is healthiest? The pros and cons of tap ...

    www.aol.com/lifestyle/drinking-water-healthiest...

    While some bottled water is from a spring or filtration system, research shows that nearly 65% of bottled water sold in the U.S. comes from municipal tap water. But Rumpler says there can be ...

  7. AOL Mail

    mail.aol.com

    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!

  8. Water supply network - Wikipedia

    en.wikipedia.org/wiki/Water_supply_network

    The sustainable water supply system is an integrated system including water intake, water utilization, wastewater discharge and treatment and water environmental protection. It requires reducing freshwater and groundwater usage in all sectors of consumption.

  9. Zip Industries - Wikipedia

    en.wikipedia.org/wiki/Zip_Industries

    Prior to 1962, Zip focused primarily on water heaters for kitchens and hot water heaters for bathrooms. Zip began manufacturing and marketing in Australia from about 1947. An early Zip innovation was a manually operated over-sink boiling water heater with a "ready whistle" and automatic cut-off, which became a popular fixture in Australian restaurants and community kitchens during the 1950s ...