1.1 本规范涵盖了适用于机械使用的所有标准类型的卷毡和片材。某些特殊用途的毡也包括在内。 1.2 本规范不适用于使用编织、编织、缝合或粘合的毡状产品，如造纸机毡。 1.3 毛毡行业的贸易惯例以磅、码和英寸为单位进行交易，因此以英寸-磅为单位的数值应视为标准值。国际单位制数值仅供参考。 1.3.1 中引用的规范 2.2 仅使用英寸-磅单位。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。

1.1 This specification covers all standard types of felt in the form of rolls and sheets that are suitable for mechanical use. Certain special-purpose felts are also covered. 1.2 This specification is not applicable to felt-like products that utilize weaving, knitting, stitching, or bonding such as papermaker's felt. 1.3 Trade practice in the felt industry deals in pounds, yards, and inches, therefore the values stated in inch-pound units are to be regarded as standard. The values in SI units are provided as information only. 1.3.1 The specification referenced in 2.2 uses only inch-pound units. 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.