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  2. Manhole cover - Wikipedia

    en.wikipedia.org/wiki/Manhole_cover

    A round manhole and its cover. A manhole cover is a removable plate forming the lid over the opening of a manhole, an opening large enough for a person to pass through that is used as an access point for an underground vault or pipe. It is designed to prevent anyone or anything from falling in, and to keep out unauthorized persons and material.

  3. Neenah Foundry - Wikipedia

    en.wikipedia.org/wiki/Neenah_Foundry

    Neenah Foundry; Company type: Private; Subsidiary: Industry: Foundry: Founded: 1872, 153 years ago: Headquarters: 2121 Brooks Avenue Neenah, Wisconsin, U.S.: Products: Cast iron infrastructure solutions (manhole frames and covers, inlet frames and grates, trench frames and grates, airport products, bridge drainage, tree grates, detectable warning products, downspout boots, access and hatch ...

  4. Sanitary manhole - Wikipedia

    en.wikipedia.org/wiki/Sanitary_manhole

    A sanitary manhole under construction. A sanitary manhole (sewer manhole, [1] sanitary sewer manhole [2] or sewer maintenance hole [3]) is a manhole that is used as an access point for maintenance and inspection of an underground sanitary sewer system. Sanitary manholes are sometimes used as vents to prevent the buildup of pressurized sewage ...

  5. Manhole - Wikipedia

    en.wikipedia.org/wiki/Manhole

    Manhole covers in Helsinki, Finland. Manhole closings are protected by a grating or manhole cover, a flat plug designed to prevent accidental or unauthorized access to the manhole. These covers are traditionally made of metal, [2] but may be constructed from precast concrete, glass reinforced plastic or other composite materials (especially ...

  6. Centrifugal casting (industrial) - Wikipedia

    en.wikipedia.org/wiki/Centrifugal_casting...

    Typical materials that can be centrifugal cast are metals, cements, concretes, glass, and pottery materials. Typical metals cast are iron, steel, stainless steels, and alloys of nickel, aluminum, and copper, magnesium. Two materials can be combined by introducing a second material during the process.

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  8. Scrap - Wikipedia

    en.wikipedia.org/wiki/Scrap

    The more frequently recycled metals are scrap steel, iron (ISS), lead, aluminum, copper, stainless steel, and zinc. Steel [9] is the most recycled due to its sustainable properties. There are two main categories of metals: ferrous and non-ferrous. Metals that contain iron in them are known as ferrous. Metals without iron are non-ferrous.

  9. Mobarakeh Steel Company - Wikipedia

    en.wikipedia.org/wiki/Mobarakeh_Steel_Company

    The iron plant complex has 10 main production line units (the rest are auxiliary and back up units). Iron ores with large grains from Golgohar are converted by ball mills in the Pelletizing plant. After mixing with Chadermalou's smaller grains and bentonite in blending machines it is changed to pellets (diameter: 6–25 mm) and screened by a ...

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