ISO 14405-3:2016建立了角度尺寸的默认规范运算符，并定义了一些特殊的规格运算符，用于角度大小的特征:锥形（截头，即平截头体，或非锥形），楔形（截头或非截面），两条相对的直线（楔形/截头楔形体与垂直于楔形/截锥形楔形两个平面的交点直线的平面的交点，锥/平截头体与包含锥/锥体的旋转轴的平面的交点）。参见图1和图2。 ISO 14405-3:2016还定义了这些角度尺寸的规格修改器和绘图指示。 ISO 14405-3:2016涵盖以下角度尺寸: - 局部角度尺寸: - 两条线之间的角度尺寸; - 部分角尺寸; - 全局角尺寸: - 直接全局角尺寸: - 最小二乘角尺寸; - 极小角度尺寸; - 等级角度大小/间接全局角度大小: - 最大角度尺寸; - 最小角尺寸; - 平均角尺寸; - 角度范围; - 中档角尺寸; - 中位角尺寸; - 角尺寸的标准偏差。 ISO 14405-3:2016定义了角度尺寸公差的含义 - 和/或 - 限制偏差，例如0°/ -0,5°，或 - 用上限表示

This part of ISO 14405 establishes the default specification operator for angular size and defines a number of special specification operators for features of angular size: cone (truncated, i.e. frustum, or not), wedge (truncated or not), two opposite straight lines (intersection of a wedge/truncated wedge and a plane perpendicular to the intersection straight line of the two planes of the wedge/truncated wedge, intersection of a cone/frustum and a plane containing the axis of revolution of the cone/frustum). See Figure 1 and Figure 2. This part of ISO 14405 also defines the specification modifiers and the drawing indications for these angular sizes. This part of ISO 14405 covers the following angular sizes: —    local angular size: —    angular size between two lines; —    portion angular size; —    global angular size: —    direct global angular size: —    least squares angular size; —    minimax angular size; —    rank order angular size/indirect global angular size: —    maximum angular size; —    minimum angular size; —    average angular size; —    range of angular sizes; —    mid-range angular size; —    median angular size; —    standard deviation of angular size. This part of ISO 14405 defines the meaning of tolerances of angular sizes indicated as —    + and/or - limit deviations, e.g. 0°/-0,5°, or —    indicated with upper limit of size (ULS) and/or lower limit of size (LLS), e.g. 35° max. or 15° min., 34°/36°, —    with or without modifiers. This part of ISO 14405 provides a set of tools to express several types of angular size characteristics. It does not give any information on the relationship between a function or a use and an angular size characteristic.