GB/T 19520.14-2009 电子设备机械结构 482.6mm(19in)系列机械结构尺寸 第3-103部分:编码键和定位销 Mechanical structures for electronic equipment - Dimensions of mechanical structures of the 482.6 mm (19 in) series - Part 3-103: Keying and alignment pin
Mechanical structures for electronic equipment - Dimensions of mechanical structures of the 482.6 mm (19 in) series - Part 3-103: Keying and alignment pin