1.1 本试验方法涵盖航空航天透明外壳玻璃表面划痕的目视检查。 1.2 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.3 本标准可能涉及危险材料、操作和设备。本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 所有玻璃表面都有划痕。清洁操作中经常会有非常细微的划痕，当透过玻璃看时是看不见的。可见的划痕可能会分散透过透明物观看的观察者的注意力。 因此，定义划痕严重程度的程序是有用的。使用视觉标准是因为在本试验方法的范围内测量细微划痕的尺寸是不实际的。

1.1 This test method covers the visual inspection of scratches on the glass surface of aerospace transparent enclosures. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 Scratches exist on all glass surfaces. Often there are very fine scratches from cleaning operations that are not visible when looking through the glass. Visible scratches may be distracting to the observer looking through the transparency. Therefore, a procedure to define the severity of scratches is useful. A visual standard is used because it is not practical to measure the dimensions of the fine scratches in the scope of this test method.