BS EN 116303:1996 电子元器件的质量评定协调体系.空白详细规范.经质量评定的机电式逻辑运算重载继电器（气密的5A至25A）
Harmonized system of quality assessment for electronic components - Blank detail specification: electromechanical all-or-nothing heavy load relays of assessed quality (hermetically sealed, 5A to 25A)