DIN EN 80416-2:2002-05
设备上使用的图形符号的基本原则 第2部分:箭头的形式和使用
Basic principles for graphical symbols for use on equipment - Part 2: Form and use of arrows (ISO 80416-2:2001); German version EN 80416-2:2001 / Note: DIN ISO 4196 (1985-10) remains valid alongside this standard until 2004-07-01.