论文部分内容阅读
直角尺是机械制造业中常用的角度量具。圆柱直角尺作为计量标准器具主要用于校准或检定等级比其低的直角尺。其他直角尺主要用于检验工件及机床、仪器导轨的相互垂直度。直角尺通常用钢、铸铁或花岗石制成。
Square ruler is commonly used in machinery manufacturing industry angle measuring tools. Cylindrical rectangular ruler as a standard instrument used mainly to calibrate or test lower than the level of its right angle ruler. Other square ruler is mainly used to test the workpiece and machine tools, instrument rails perpendicularity. Squares are usually made of steel, cast iron or granite.