====意义和用途====== E-4委员会的标准包括测试方法、实践和指南，以确保在金相学领域进行适当和统一的测试。为了正确使用和解释这些标准，必须理解这些标准中使用的术语。 金相学领域中使用的术语有精确的定义。必须完全理解术语及其正确用法，以便在该领域进行充分沟通。在这方面，本标准也是金相学领域相关术语的通用来源，有助于在该领域内传递信息。

====== Significance And Use ====== Standards of Committee E-4 consist of test methods, practices, and guides developed to ensure proper and uniform testing in the field of metallography. In order for one to properly use and interpret these standards, the terminology used in these standards must be understood. The terms used in the field of metallography have precise definitions. The terminology and its proper usage must be completely understood in order to adequately communicate in this field. In this respect, this standard is also a general source of terminology relating to the field of metallography facilitating the transfer of information within the field.