DIN EN ISO 7010/A6:2017 图形符号.安全色和安全标志.注册安全标志 (ISO 7010-2011/Amd 6-2014);德文版本EN ISO 7010-2012/A6-2016
Graphical symbols - Safety colours and safety signs - Registered safety signs - Amendment 6 (ISO 7010:2011/Amd 6:2014); German version EN ISO 7010:2012/A6:2016