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2. Manhole cover - Wikipedia

   en.wikipedia.org/wiki/Manhole_cover

   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.

3. Sanitary manhole - Wikipedia

   en.wikipedia.org/wiki/Sanitary_manhole

   A manhole cover unable to contain a sanitary sewer overflow. Sanitary sewer overflow is a condition in which untreated sewage is discharged from a sanitary sewer into the environment prior to reaching sewage treatment facilities. Manholes are common locations of sanitary sewer overflows.

4. Answer Woman: Who makes the manhole covers with river ...

   www.aol.com/answer-woman-makes-manhole-covers...

   A reader asks for details about the Metropolitan Sewerage District's designed manhole covers.

5. Manhole - Wikipedia

   en.wikipedia.org/wiki/Manhole

   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. Manholes, typically protected by a manhole cover , are often used as an access point for an underground public utility , allowing inspection, maintenance, and system upgrades.

6. Sanitary sewer - Wikipedia

   en.wikipedia.org/wiki/Sanitary_sewer

   Manhole access to sewer Schematic of a conventional sanitary sewer to convey blackwater and greywater from households to a centralized sewage treatment facility. [3] A manhole cover for a sanitary sewer access point. View looking down into an open manhole showing two converging sanitary sewer lines.

7. Manhole cover lifter can save the back of workers

   www.aol.com/news/manhole-cover-lifter-save-back...

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