Manhole

This is a sewer manhole, exposed during construction. Typically, only the top ring and manhole cover (not pictured) would be visible.

Manhole cover of precast concrete in Germany

A manhole (alternatively utility hole, cable chamber, maintenance hole, inspection chamber, access chamber, sewer hole, smellhole, flabhole, ding-dong or confined space) is the top opening to an underground utility vault used to house an access point for making connections, inspection, valve adjustments or performing maintenance on underground and buried public utility and other services including sewers, telephone, electricity, storm drains, district heating and gas.

单词	Access hole
释义	Access hole 原声例句奇趣工程百科 There are access holes for each of the BELAZ's 8 air filters. BELAZ 的 8 个空气过滤器均设有检修孔。英语百科 Manhole A manhole (alternatively utility hole, cable chamber, maintenance hole, inspection chamber, access chamber, sewer hole, smellhole, flabhole, ding-dong or confined space) is the top opening to an underground utility vault used to house an access point for making connections, inspection, valve adjustments or performing maintenance on underground and buried public utility and other services including sewers, telephone, electricity, storm drains, district heating and gas.
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Access hole

Manhole