高频射频
high-frequency radiosurgical device
HFIRF
射频频谱学
radio-frequency spectroscopy
射频身份识别
RFID
Radio Frequency Identification RFID
Beijing special education
无线射频身份识别
RFID Radio Frequency Identification
1550nm射频副载波调制干线光传输
1550 nm light transmission of sub-carrier modulate trunk