This document is drafted in accordance with the rules given in the GB/T 1.1—2020 Directives for standardization-Part 1: Rules for the structure and drafting of standardizing documents and GB/T 20001.10—2014 Rules for drafting standards―Part 10: Product standards.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.