A hole, frequently with a cover, through which you may enter a sewer, boiler, strain, or comparable framework.
A hole in the floor always access the sewers or any other underground vaults and installations.
A hole whereby a person may descend or creep into a drain, sewer, steam-boiler, components of machinery, etc., for cleansing or repairing.
A hole by which a guy may enter a sewer, drain, cesspool, and/or like, for cleaning or repairing; in steam-boilers, hot-water tanks, keirs, etc., a hole created when you look at the shell, through which a guy may enter into the interior for cleaning, inspection, or repair works.
In coal-mining: An excavation or refuge-hole manufactured in the side of an underground engine-plane or horse-road. [Eng.] A small and generally short passage useful for the ingress and egress of this miners. [Pennsylvania anthracite, region.] A niche cut-in along side it of a railroad-tunnel as a refuge-hole.
a hole (usually with a flush cover) through which a person can access an underground structure