美利体育登录入口官网:IEC 60457-4:1978
刚性精密同轴线及其相关的精密连接器 第4部分:21mm刚性精密同轴线及其相关的中性精密同轴连接器 特性阻抗50Ω(9/21型) - 特性阻抗75Ω(6/21型)
Rigid precision coaxial lines and their associated precision connectors. Part 4 : 21 mm rigid precision coaxial line and associated hermaphroditic precision coaxial connector. Characteristic impedance 50 ohms (Type 9/21) - Characteristic impedance 75 ohms