基于通过测量半径变化确定圆度偏差的方法的接触式（触针）仪器的特性。附录涉及测量轮廓的圆度偏差、仪器的使用、校准、系统误差的测定、最小二乘中心和圆绘图以及读取极坐标图。交叉引用:BS 3730:第1部分替换BS 3730:1964。

Characteristics of contact (stylus) instruments based on the method of determining departures from roundness by measuring variations in radius. Appendices deal with departure from roundness of the measured profile, use of instrument, calibration, determination of systematic errors, least square centre and circle plotting and reading polar graphs.Cross References:BS 3730:Part 1Replaces BS 3730:1964.