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(Left) Try square and (right) steel square
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(Left) Try square and (right) steel square
(Left) Try square and (right) steel square

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square, in measurement, device consisting of two straightedges set at right angles to each other. It is used by carpenters and machinists for checking the correctness of right angles, as a guide when drawing lines on materials before cutting, or for locating holes. The tools shown in the Figure are carpenter’s squares. There are two main types of machinist squares: the precision steel square, which resembles the try square in the Figure but is not graduated, and the combination square set. The latter consists of a steel ruler and three attachments that can slide and be clamped on it—namely, the ...(100 of 233 words)

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