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  2. Sanitary manhole - Wikipedia

    en.wikipedia.org/wiki/Sanitary_manhole

    Scrapper manhole openings are with sizes between 90 and 120 centimetres (3.0 and 3.9 ft). [28] An alternative to having people to go down scraper manholes to remove sewer blockage is to use jet rodders and vacuum trucks. Those can be operated from the ground level though normal size manholes [1]

  3. Manhole cover - Wikipedia

    en.wikipedia.org/wiki/Manhole_cover

    The theft of manhole covers often increases when scrap metal prices are high. [18] [19] Manhole cover theft can be a serious problem in China, where missing manhole covers caused at least eight deaths in 2004. [20] According to China's Xinhua News Agency, about "240,000 manhole and street-drain covers were stolen in Beijing in 2004." [21]

  4. Manhole - Wikipedia

    en.wikipedia.org/wiki/Manhole

    A manhole (utility hole, maintenance hole, [1] or sewer hole) is an opening to a confined space such as a shaft, utility vault, or large vessel.

  5. Sanitary sewer - Wikipedia

    en.wikipedia.org/wiki/Sanitary_sewer

    Manhole access to sewer Schematic of a conventional sanitary ... so the treatment plant can be much smaller than a typical plant. ... Pipelines range in size from ...

  6. Glossary of boiler terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_boiler_terms

    Manhole an oval access door into a part of the boiler, for example the shell or, in a water tube boiler, the top drum or chamber, large enough for a worker to enter and used for maintenance and cleaning. Manholes are sealed with a removable door from the inside. As they are oval, this door may be turned and lifted out through the hole.

  7. 5 Things to Avoid When You Have Alopecia Areata - AOL

    www.aol.com/5-things-avoid-alopecia-areata...

    2. Excessive Stress. Stress is a natural, normal part of the human experience, and your body knows how to handle it. When you’re under stress, your body releases stress hormones that activate ...