power frequency ground resistance 工频接地电阻 ; 接地电阻

ground-air radio frequency 地空通信频率

RF-GND Radio Frequency Ground 射频接地

IFGND Intermediate Frequency Ground 中频信号接地端

air-to-ground radio frequency 空对地无线电通信频率 ; 空对地无线电频率

RFGND Radio Frequency Ground 射频接地

RFCLKGND Radio Frequency Clock Ground 射频时钟接地

Stepped-Frequency Ground Penetrating Radar 步进频率探地雷达

power-frequency ground 工频接地

low-frequency ground motion 低频地表振动