DIN EN 60309-2:2007
工业用插头、插座和耦合器.第2部分:插销和插套附件的尺寸互换性要求
Plugs, socket-outlets and couplers for industrial purposes - Part 2: Dimensional interchangeability requirements for pin and contact-tube accessories (IEC 60309-2:1999 + A1:2005, modified); German version EN 60309-2:1999 + A1:2007