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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.
The constraint "non-traffic areas" is also the crucial difference to the general European Standard for manhole covers EN124, which is only for vehicular access areas. Plastic-manhole covers according to ISO 15398 are designated for the commitment on control- and inspection chambers in pedestrian (class A 15) and light vehicular areas (max ...
PMG manholes in a city street, Perth, Western Australia Manhole being used to access sewer Installation of a fiber-optic manhole in Brooklyn, New York An uncovered manhole in Beirut, Lebanon. 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.
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 ...
The New Wide Screen version of Manhole was recreated as a DSiWare game that was released on August 19, 2009 in Japan, [41] on April 5, 2010 in the United States [54] and on April 9 in Europe; [55] and for Nintendo 3DS on July 7, 2011 in Europe. [55] In Warioware Gold, Manhole is one of the unlockable minigames.
A H-20 highway loading packaged metering manhole during installation. Packaged metering manholes (PMMs) are an outgrowth of the fiberglass manholes developed in the 1960s. . Packaged metering manhole factories integrate a primary device (typically a flume [1] or weir [2]) into a fiberglass ma
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