DIN EN 14508-2016 邮政服务.服务质量.单件无优先权邮件与二等邮件的点对点运送时间的测量.德文版本EN 14508-2016
Postal services - Quality of service - Measurement of the transit time of end-to-end services for single piece non-priority mail and second class mail; German version EN 14508:2016