IEC 61811-55-2002
机电"有"或"无"继电器.第55部分:空白详细规范.经质量认证的机电"有"或"无"电信继电器.11 mm X 5.5 mm 基的双转化触点
Electromechanical all-or-nothing relays - Part 55: Blank detail specification; Electromechanical all-or-nothing telecom relays of assessed quality; Two change-over contacts, 11 mm x 7,5 mm (max.) base