NF C93-565-21*NF EN 60169-21:1998
射频连接器 第21部分:带不同型式耦合连接件的外导线内径为 9.5 mm(0.374 in)的射频连接器的两种型号 特性阻抗 50 欧姆(SC-A 和 SC-B 型)
Radio-frequency connectors. Part 21 : two types of radio-frequency connectors with inner diameter of outer conductor 9,5 mm (0,374 in) with different versions of screw coupling. Characteristic impedance 50 ohms (types SC-A and SC-B).