TM 9-243USING A SLIDING T-BEVEL SQUARE - Continued3Mark with a pencil or marking crayon. Make sure thesquare does not move while marking.USING A COMBINATION SQUAREUsing as a center head to find the diameter of a cylinder:1Slide center head (1) on rule (2) and fasten bytightening setscrew (3).3Mark the diameter on the cylinder using a pencil ormarking crayon by drawing a straight line along theinside edge (4). Make sure the square does not slipwhile marking.2Put the center head flush against the cylinder.13-6
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