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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.
A drain cover is a cover with holes (e.g. a manhole) or a grating used to cover a drain, to prevent unwanted entry of foreign objects, or injury to people or animals. It allows drainage of liquids but prevents entry from large solid objects, and thus acts as a coarse filter. A sink drain cover is a drain cover used to cover the sink drain.
As optical elements, optical gratings are images having the characteristic pattern of alternating, parallel lines. The lines alternate between high and low reflectance (black-white gratings) or high and low transmittance (transparent-opaque gratings). The grating profile is the function of the reflectance or transmittance perpendicular to the ...
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.
Grate may refer to: . Grate, the metal part of a fireplace where the fire is placed; Grate, the act of using a grater, a kitchen utensil; Grate, or grille, a barrier through which small objects can fall, while larger objects cannot
It isn't the holidays without Trader Joe's, a one-stop shop for seasonal snacks and products. Here, you'll find the best Trader Joe's holiday items for 2024!
A grate (or fire grate) is a frame, usually of iron bars, to retain fuel for a fire. Heavy metal firebacks are sometimes used to capture and re-radiate heat, to protect the back of the fireplace, and as decoration. Fenders are low metal frames set in front of the fireplace to contain embers, soot and ash.
The College Football Playoff bracket is finally set and Caroline Fenton, Jason Fitz & Adam Breneman react to the final rankings and share what things the committee got right and which were wrong.