manhole -
a hole (usually with a flush cover) through which a person can gain access to an underground structure
hole an opening deliberately made in or through something
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Wiktionary
Substantiv
manhole -
A hole in the ground used to access the sewers or other underground vaults and installations.
Wikipedia
A manhole (alternatively utility hole, cable chamber, maintenance hole, inspection chamber or access chamber) is the top opening to an underground utility vault used to house an access point for making connections or performing maintenance on underground and buried public utility and other services including sewers, telephone, electricity, storm drains and gas. It is protected by a manhole cover, also known as a 'biscuit', a plug designed to prevent accidental or unauthorized access to the manhole. Those plugs are usually made of metal or constructed from precast concrete (especially in Europe).
OmegaWiki Dictionary
Ω
manhole An opening in the ground used to access the sewers or other underground installations.
