Gratings
A grating is any regularly spaced collection of essentially identical, parallel, elongated elements. Gratings usually consist of a single set of elongated elements, but can consist of two sets, in which case the second set is usually perpendicular to the first. A grating covering a drain can be a collection of iron bars held together by a lighter iron frame. Gratings over drains and air vents are…
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A grating is any regularly spaced collection of essentially identical, parallel, elongated elements. Gratings usually consist of a single set of elongated elements, but can consist of two sets, in which case the second set is usually perpendicular to the first. A grating covering a drain can be a collection of iron bars held together by a lighter iron frame. Gratings over drains and air vents are used as filters, to block movement of large particles and to allow movement of small particles. Less
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Tree Grates
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