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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.
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 ...
move to sidebar hide (Top) 1 Markings. 2 References. Toggle the table of contents. ... "Photos of NYC Manhole Covers, March, 2013. "NYC DEP Weekly Pipeline", August 3 ...
Cistern in the Mission District, San Francisco, California. The Auxiliary Water Supply System (AWSS, though often referred to on manhole covers and hydrants as HPFS for High Pressure Fire System) is a high pressure water supply network built for the city of San Francisco in response to the failure of the existing emergency water system during the 1906 earthquake.
In April 2015, an underground safe deposit facility in Hatton Garden, London, owned by Hatton Garden Safe Deposit Ltd., was burgled. According to official sources, the total stolen had an estimated value of up to £14 million (equivalent to £20 million in 2023), of which only £4.3 million (equivalent to £6 million in 2023) has been recovered.
Photo of the bed sheet rope used in the 'tea chest' escape from Colditz by Dominic Bruce. On 12 May 1941, Polish Lieutenants Miki Surmanowicz and Mietek Chmiel, attempted to rappel down a 36 m (120 Ft) wall to freedom on a rope constructed out of bed sheets. In order to get into position, both men put themselves into solitary confinement.
The title story can be read as a response to stories featuring the many-worlds interpretation as a key plot point, by taking the social implications of infinite realities to a depressing conclusion.
Raised bed gardening. Raised-bed gardening is a form of gardening in which the soil is raised above ground level and usually enclosed in some way. Raised bed structures can be made of wood, rock, concrete or other materials, and can be of any size or shape. [1] The soil is usually enriched with compost. [2]