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  2. Drain-waste-vent system - Wikipedia

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

    In the U.S., every plumbing fixture must also be coupled to the system's vent piping. [1] Without a vent, negative pressure can slow the flow of water leaving the system, resulting in clogs, or cause siphonage to empty a trap. The high point of the vent system (the top of its "soil stack") must be open to the exterior at atmospheric pressure.

  3. Naval Support Facility Diego Garcia - Wikipedia

    en.wikipedia.org/wiki/Naval_Support_Facility...

    Naval Support Facility Diego Garcia, abbreviated NSF Diego Garcia, [1] is a British Ministry of Defence facility leased to the United States Navy, located on the atoll Diego Garcia in the Indian Ocean, for an initial period of 99 years after the forced removal and expulsion of over 2,000 native inhabitants of the island.

  4. Installed base - Wikipedia

    en.wikipedia.org/wiki/Installed_base

    The installed base of company's products represents a valuable customer base that is already using their products, services or systems [citation needed].This provides companies with an opportunity to upsell and cross-sell their products to existing customers [citation needed], as well as to use the information about their customer base to inform future product development and marketing efforts.

  5. Adjusted cost base - Wikipedia

    en.wikipedia.org/wiki/Adjusted_cost_base

    In the Canadian tax system the term Adjusted cost base (ACB) refers to the cost of an investment adjusted for several tax-related items including acquisition costs. [1]