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  2. Trisodium phosphate - Wikipedia

    en.wikipedia.org/wiki/Trisodium_phosphate

    TSP is still sold and used as a cleaning agent, but since the late 1960s, its use has diminished in the United States and many other parts of the world because, like many phosphate-based cleaners, it is known to cause extensive eutrophication of lakes and rivers once it enters a water system.

  3. Tape head cleaner - Wikipedia

    en.wikipedia.org/wiki/Tape_head_cleaner

    A tape head cleaner is a substance or device used for cleaning the record and playback heads of a magnetic tape drive found in video or audio tape machines such as cassette players and VCRs. [1] These machines require regular maintenance to perform properly.

  4. Swimming pool sanitation - Wikipedia

    en.wikipedia.org/wiki/Swimming_pool_sanitation

    Rotational force the pool return jets create is the most important part of cleaning the pool water and pushing organic waste across the mouth of the skimmer. With a correctly designed and operated swimming pool, this circulation is visible and after a period of time, reaches even the deep end, inducing a low-velocity vortex above the main drain ...

  5. Signal operating instructions - Wikipedia

    en.wikipedia.org/wiki/Signal_operating_instructions

    Signal operating instructions (SOI) or Communications-Electronics Operation Instructions (CEOI) are U.S. military terms for a type of combat order issued for the technical control and coordination of communications within a command. [1]

  6. Central Geological Service - Wikipedia

    en.wikipedia.org/wiki/Central_Geological_Service

    The Central Geological Service (formerly Geology stream of GSI) was constituted as an Organized Group ‘A’ Gazetted Service as per DOPT OM No. I-11019/12/2008-CRD dated 19/11/2009 by the Cadre Controlling Authorities. GSI is organized group 'A' service since 1982 as per DoPT O.M.No.5/12/79-PP-II dated 31.07.1982 and schedule -I.

  7. Geological Strength Index - Wikipedia

    en.wikipedia.org/wiki/Geological_Strength_Index

    The Geological Strength Index (GSI) system, proposed in 1994 by Evert Hoek, is used for the estimation of the rock mass strength and the rock mass deformation modulus.. The GSI system concentrates on the description of two factors, rock structure and block surface conditions.