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  2. Pond liner - Wikipedia

    en.wikipedia.org/wiki/Pond_liner

    Pond liners need to be protected from sharp objects (for example, stones) below the liner and from being punctured by any objects in the water body. Protection can be provided with layers of sand, geotextiles (particularly needle-punched nonwovens) and other materials. Pond liners are manufactured in rolls or accordion-folded on pallets.

  3. Swimming pool sanitation - Wikipedia

    en.wikipedia.org/wiki/Swimming_pool_sanitation

    When any of these pool chemicals are used, it is very important to keep the pH of the pool in the range 7.2 to 7.8 – according to the Langelier Saturation Index, or 7.8 to 8.2 – according to the Hamilton Index; higher pH drastically reduces the sanitizing power of the chlorine due to reduced oxidation-reduction potential (ORP), while lower ...

  4. Swimming pool - Wikipedia

    en.wikipedia.org/wiki/Swimming_pool

    A swimming pool, swimming bath, wading pool, paddling pool, or simply pool, is a structure designed to hold water to enable swimming or other leisure activities. Pools can be built into the ground (in-ground pools) or built above ground (as a freestanding construction or as part of a building or other larger structure), and may be found as a ...

  5. QSMV Dominion Monarch - Wikipedia

    en.wikipedia.org/wiki/QSMV_Dominion_Monarch

    Dominion Monarch was the world's most powerful motor liner. [5] She was powered by four William Doxford & Sons five-cylinder two-stroke single-acting diesel engines, each of 28 + 9 ⁄ 16 inches (72.5 cm) bore by 88 + 9 ⁄ 16 inches (2.25 m) stroke. [3] Two engines were built by Swan Hunter and two under licence by Sunderland Forge.

  6. Cured-in-place pipe - Wikipedia

    en.wikipedia.org/wiki/Cured-in-place_pipe

    Sewage repairmen inserting uncured liner into a soon-to-be repaired pipe. A cured-in-place pipe (CIPP) is a trenchless rehabilitation method used to repair existing pipelines. It is a jointless, seamless pipe lining within an existing pipe.

  7. Queen Mary 2 - Wikipedia

    en.wikipedia.org/wiki/Queen_Mary_2

    In total, 16 people were killed and another 32 people injured after a 15-metre (49 ft) fall into the drydock. [21] Construction was completed on schedule. [22] On 22 December 2003, Queen Mary 2 left Saint-Nazaire and arrived in Southampton, England, on 26 December 2003. [23] On 8 January 2004, the liner was officially named by Queen Elizabeth ...

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