本指南的范围是为垫圈制造商和电子系统设计师提供垫圈特性的适当方法。本文件指导用户选择适当的测试方法，以确定预期应用中提供的电磁屏蔽水平。

The scope of this guide is to provide manufacturers of gaskets and designers of electronic systems appropriate methods for the characterization of gaskets. This document guides the user in the selection of the appropriate test method in order to determine the level of electromagnetic shielding provided in the intended application.