There are no normative references at present.

目前尚无引用标准。

There are no normative references. This clause is included to maintain clause numbering alignment with other ISO management system standards.

没有引用标准，这一条款旨在与其他ISO管理体系标准保持对应的条款号。

Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication.

请注意在本标准中所引用到的标准。正确使用本标准必须参考所引用的标准。

For undated references, the lastest edition of the normative document referred to applies.

若引用的文件不标日期，则本标准应采用该引用标准文件的最新版本。

P The following normative documents contain provisions which, through references in this text, constitutive provisions of this European standard.

下列标准文件由本文引用欧洲标准规定的条款构成。