AS/NZS ISO 17420.3:2021同样适用于澳大利亚的ISO 17420-3:2012，该标准适用于无辅助过滤装置，并规定了AS/NZS 17420.2中要求的过滤器和呼吸接口之间的标准螺纹连接。本文件还包括对评估某些要求所需的测试模拟器的描述。关键词:呼吸防护装置；过滤装置；螺纹连接

AS/NZS ISO 17420.3:2021 identically adopts ISO 17420-3:2012 for Australia, which applies to an unassisted filtering device and specifies a standard thread connection between a filter and the respiratory interface as required in AS/NZS 17420.2. This document also includes the description of test simulators that are necessary for the assessment of some of the requirements. KEYWORDS: Respiratory protective devices; Filtering device; Thread connection