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  2. Check valve - Wikipedia

    en.wikipedia.org/wiki/Check_valve

    A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various ...

  3. Double check valve - Wikipedia

    en.wikipedia.org/wiki/Double_check_valve

    A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.

  4. Propane, butane, and LPG container valve connections

    en.wikipedia.org/wiki/Propane,_butane,_and_LPG...

    Several types of valve connections for propane, butane, and LPG containers exist for transport and storage, sometimes with overlapping usage and applications, and there are major differences in usage between different countries. Even within a single country more than one type can be in use for a specific application.

  5. List of tariffs in Pakistan - Wikipedia

    en.wikipedia.org/wiki/List_of_tariffs_in_Pakistan

    [2] References "Customs Act 1969 (amended 2008) Chapter V". Archived from the original on 2009-03-02. This page was last edited ... List of tariffs in Pakistan.

  6. Videocassette recorder - Wikipedia

    en.wikipedia.org/wiki/Videocassette_recorder

    Its cartridges, resembling larger versions of the later VHS cassettes, used 3/4-inch (1.9 cm)-wide tape and had a maximum playing time of 60 minutes, later extended to 80 minutes. Sony also introduced two machines (the VP-1100 videocassette player and the VO-1700, also called the VO-1600 video-cassette recorder) to use the new tapes.

  7. Mercedes-Benz M120 engine - Wikipedia

    en.wikipedia.org/wiki/Mercedes-Benz_M120_engine

    There was also a 7.3 L version producing 525 PS (386 kW; 518 hp) developed by AMG which was also used in the SL 73 AMG, S 73 AMG and CL 73 AMG. [2] The 7.3 L M120 engine was also featured in the AMG-built, S 73 T Kombi, a custom-built W140 S-Class wagon for the Sultan of Brunei. Eighteen units were produced, ten of which went to the Sultan. [3]

  8. Cottage and small scale industries in Pakistan - Wikipedia

    en.wikipedia.org/wiki/Cottage_and_small_scale...

    The export market for sports goods is fairly diversified. More and more countries are being added to the list of their imports. In 1990-91 there were in all 50 countries importing these good from Pakistan. Thereafter, the list has continuously expanded so that during the 1992-98 period, Pakistan exported sports goods to 90 countries.

  9. Utility Stores Corporation - Wikipedia

    en.wikipedia.org/wiki/Utility_Stores_Corporation

    The Utility Stores Corporation of Pakistan (USCP) is a Pakistani state-owned enterprise that operates chain stores throughout the country that provide basic commodities to the general public at prices which are lower than the open market because the government subsidizes them. [1] It is the largest chain-store entity in the country with 5,939 ...

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