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2. Sanitary manhole - Wikipedia

   en.wikipedia.org/wiki/Sanitary_manhole

   The vertical pipe of a plunging drop manhole (known as a drop pipe) can be configured in two ways. One way is to have the drop pipe inside the manhole. The other way is to have the drop pipe outside but next to the manhole. For outside drop pipes, there should be a clean out pipe connecting back to the manhole wall to allow inspection to ...

3. Drain-waste-vent system - Wikipedia

   en.wikipedia.org/wiki/Drain-waste-vent_system

   A sewer pipe is normally at neutral air pressure compared to the surrounding atmosphere.When a column of waste water flows through a pipe, it compresses air ahead of it in the system, creating a positive pressure that must be released so it does not push back on the waste stream and downstream traps, slow drainage, and induce potential clogs.

4. List of GM transmissions - Wikipedia

   en.wikipedia.org/wiki/List_of_GM_transmissions

   The General Motors Automatic Safety Transmission (AST) was a semi-automatic transmission released in 1937. The first mass-produced fully-automatic transmission developed for passenger automobile use was the GM Hydra-Matic introduced in the autumn of 1939 as a (very likely subsidized) $57 option for the 1940 Oldsmobile. [1]

5. File:Sanitary manhole parts.jpg - Wikipedia

   en.wikipedia.org/.../File:Sanitary_manhole_parts.jpg

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6. Parking pawl - Wikipedia

   en.wikipedia.org/wiki/Parking_pawl

   The parking pawl locks the transmission's output shaft to the transmission casing by engaging a pawl (a pin) that engages in a notched wheel on the shaft, stopping it (and thus the driven wheels) from rotating. The main components of a parking pawl mechanism are the parking gear, parking pawl, actuator rod, cam collar, cam plate, pivot pin, and ...

7. Packaged metering manhole - Wikipedia

   en.wikipedia.org/wiki/Packaged_Metering_Manhole

   Packaged metering manhole factories integrate a primary device (typically a flume [1] or weir [2]) into a fiberglass manhole. The result is a lightweight, single-piece (generally), corrosion resistant structure from which an operator can measure piped flows, take composite samples, and perform water quality parameter monitoring.

8. Shaft (civil engineering) - Wikipedia

   en.wikipedia.org/wiki/Shaft_(civil_engineering)

   In civil engineering a shaft is an underground vertical or inclined passageway. Shafts are often entered through a manhole and closed by a manhole cover. They are constructed for a number of reasons including: For the construction of a tunnel; For ventilation of a tunnel or underground structure, aka ventilation shaft

9. Dry well - Wikipedia

   en.wikipedia.org/wiki/Dry_well

   It is a gravity-fed, vertical underground system that can capture surface water from impervious surfaces, then store and gradually infiltrate the water into the groundwater aquifer. Such a structure is also called a dead well , absorbing well , or negative well , and in the United Kingdom a soakaway or soakage pit , [ 1 ] and in Australia a ...