ISO的这一部分？14405建立了角度尺寸的默认规范运算符，并为角度尺寸的特征定义了许多特殊规范运算符:圆锥体（截头，即平截头，或不）、楔形（截头或不）、两条相对的直线（楔形/截头楔形与垂直于楔形/截头楔形的两个平面的交线的平面的交点、锥形/平截头锥与包含锥形/平截头锥旋转轴的平面的交点）。见图？1和图？2. ISO的这一部分？14405还定义了这些角度尺寸的规格修改器和图纸指示。 ISO的这一部分？14405涵盖以下角度尺寸: —？局部角度尺寸: —？两条线之间的角度大小； —？部分角度尺寸； —？全局角度大小:—？直接全局角度大小: —？最小二乘角尺寸； —？极小极大角尺寸； —？等级顺序角度大小/间接全局角度大小: —？最大角度尺寸； —？最小角度尺寸； —？平均角尺寸； —？角度尺寸范围； —？中等角度尺寸； —？中值角大小； —？角度尺寸的标准偏差。 ISO的这一部分？14405定义了角尺寸公差的含义，表示为 —？+和/或-限制偏差，例如0°/-0.5°，或 —？以尺寸上限（ULS）和/或尺寸下限（LLS）表示，例如最大35°或最小15°、34°/36°， —？带或不带修饰符。 ISO的这一部分？14405提供了一组工具来表达几种类型的角度尺寸特征。它没有给出关于功能或用途与角度尺寸特性之间的关系的任何信息。

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.