main trunnion bearing

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steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying … Universalium
Dobsonian telescope — A Dobsonian telescope on display at Stellafane in the early 1980s A Dobsonian telescope is an alt azimuth mounted newtonian telescope design popularized by the amateur astronomer John Dobson starting in the 1960s. Dobson s telescopes featured a… … Wikipedia
Field artillery — [ Union Army gun squad at drill, c. 1860.] Field artillery is a category of mobile artillery used to support armies in the field. These weapons are specialized for mobility and tactical efficiency, and not for long range nor sheer destructive… … Wikipedia
pivot — Synonyms and related words: ankle, arbor, articulation, avert, axis, axle, axle bar, axle shaft, axle spindle, axle tree, bearing, bench mark, boundary, butt, cardinal point, center, center of action, center of gravity, centroid, centrum, cervix … Moby Thesaurus

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