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2. Manhole cover - Wikipedia

   en.wikipedia.org/wiki/Manhole_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 sanitary manhole under construction. A sanitary manhole (sewer manhole, [1] sanitary sewer manhole [2] or sewer maintenance hole [3]) is a manhole that is used as an access point for maintenance and inspection of an underground sanitary sewer system. Sanitary manholes are sometimes used as vents to prevent the buildup of pressurized sewage ...

4. Packaged metering manhole - Wikipedia

   en.wikipedia.org/wiki/Packaged_Metering_Manhole

   Typical manhole barrel thickness is 3 ⁄ 8 – 1 ⁄ 2 inch (10–13 mm) thick. Thickness is assumed to be solid barrels only (not including any exterior ribbing). For manhole barrels with ribbing laminated to the exterior of the barrel, the barrel thickness is allowed to be thinner than otherwise would be allowed under ASTM D 3753.

5. Manhole - Wikipedia

   en.wikipedia.org/wiki/Manhole

   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 ...

6. Fill power - Wikipedia

   en.wikipedia.org/wiki/Fill_power

   For down sleeping bags a lofting power of 600–650 is considered good quality, 700–750 is considered very good, and 800–950+ is considered excellent. [ 2 ] [ 3 ] US 2013 norm: Cylinder diameter: 288 mm. Cylinder Height: Minimum 500 mm. Weight plate: 284 mm diameter, load weight for cylinder 94.25 g, 128 holes at 3mm.

7. AOL Mail

   mail.aol.com/?icid=aol.com-nav

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

8. Unit of length - Wikipedia

   en.wikipedia.org/wiki/Unit_of_length

   Astronomical measure uses: Earth radius R 🜨 ≈ 6,371 km [9] Lunar distance LD ≈ 384 402 km. [10] Average distance between the center of Earth and the center of the Moon. astronomical unit au. Defined as 149 597 870 700 m. [11] Approximately the distance between the Earth and Sun. light-year ly ≈ 9 460 730 472 580.8 km.

9. List of New York City manhole cover abbreviations - Wikipedia

   en.wikipedia.org/wiki/List_of_New_York_City...

   This is a list of manhole cover markings found in New York City. Fiber-Optic Manhole Cover in NYC. Markings. Bell System; BECo = Brooklyn Edison Company;