NP 2457/4-1985
无线电通信.广播电台和电视台的接受天线,其对应的范围从30 MHz到1GHz.第4部分:天线制作规格的指导.型号规格表
Radio communications. Receiving antennas for radio and television stations, corresponding to the range from 30 MHz to 1GHz. Part 4: Guidance on antenna manufacturing specifications. Model specification table