Levelling

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Wear levelling - Wear levelling (also written -levelling) is a technique for prolonging the service life of some kinds of eraseable computer storage media, e.g.

Levelling refraction - Levelling refraction refers to the systematic refraction effect distorting the results of line levelling over the Earth's surface.

Tacheometry - Tacheometry (from Greek, quick measure), is a system of rapid surveying, by which the positions, both horizontal and vertical, of points on the earth surface relatively to one another are determined without using a chain or tape or a separate levelling instrument. The ordinary methods of surveying with a theodolite, chain, and levelling instrument are fairly satisfactory when the ground is pretty clear of obstructions and not very precipitous, but it becomes extremely cumbrous when the ground is much covered with bush, or broken up by ravines.

Benchmark - A benchmark is a point of reference for a measurement. The term originates from the chiseled horizontal marks that surveyors made into which an angle-iron could be placed to bracket (bench) a levelling rod, thus ensuring that the levelling rod can be repositioned in exactly the same place in the future.

Suggested Web Sites

P.R.Engineering Ltd - UK - Manufacturer and supplier of levelling instruments including spirit levels, spirit level vials, laser levels, digital levels and precision engineers levels to industry

P.R.Engineering Ltd - Manufacturer of measuring equipment including spirit levels, spirit level vials, circular vials, laser levels, surveying levels, digital and engineers precision levels.

Mental Agility - Downloadable resources for teachers of Mathematics. Develop mental Agility in Mathematics 5-14 at level B, Level C, level D, Level E and Level F.

Source: BazSites.com

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