equal precision measuring frequency method 等精度测频法

high-frequency power measuring method [电磁] 高频功率测量法

frequency measuring method 测频方法

direct frequency measuring method 直接测频法

variable gate frequency measuring method 变闸门测频法

High precision frequency measuring method 高精度测频法

frequency-sweep measuring method 扫频测量法

high-frequency analytical measuring method [电子] 高频分析测量法

frequency and period measuring method 测频测周