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A cat hole is a one-time-use pit toilet often utilized by campers, hikers and other outdoor recreationalists. Also referred to as the "cat method," it is formed by simply digging a hole in the ground just large enough to hold the feces from one defecation event. After use, the hole is refilled with the soil that was dug out.
The outhouse also has the secondary role of protecting the toilet hole from sudden influxes of rainwater, which would flood the hole and flush untreated wastes into the underlying soils before they can decompose. [citation needed] Outhouses are commonly humble and utilitarian, made of lumber or plywood. This is especially so they can easily be ...
An eccentric cone has the top opening shifted off center all the way to one side of the manhole wall. This is to allow installing permanent ladder rungs on to the manhole wall. In designing eccentric cones, the loads need to be carefully calculated as one wall is vertical wall that is aligned to the chamber wall but the opposite wall is a slope ...
Dorade boxes operate on the principle that air can pass relatively freely through the chambers, yet rain or sea wash will be trapped in successive chambers and drain out of the small holes in the sides of the box. The principle can be applied to other forms. For example, one variant has a circular layout with the baffles as concentric rings.
The simplest manual distribution system uses a sliding metal platform under the pickup channel. When slid open, the forage drops through the open hole and down a chute into a wagon, wheelbarrow, or open pile. When closed, the forage continues past the opening and onward to other parts of the conveyor.
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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.
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