HF High Frequency 高频 ; 高音 ; 短波
high frequency heating HF heating 高频加热
high frequency hf equipment 高频设备
shipboard high frequency hf antenna 舰船短波通信天线
MHFCS has the capability to transform high Frequency (HF) communications worldwide and provides nations with the highest levels of global connectivity while enhancing their information security.
MHFCS有能力改变世界各国高频通信，为各国提供高水平连接，同时提高他们的信息安全。
Harris will supply Falcon II RF-5800H high-frequency (HF) radio systems for long-haul, beyond line-of-sight terrestrial communications.
Harris公司将提供Falcon II RF - 5800 H长途高频(HF)无线电系统，具有超视距地面通信能力。
The ratio of the low frequency to high frequency components in HRV power spectrum(LF/HF) fluctuates with the change in the sleep stages.
HRV频谱中低频和高频成分的比值（LF/HF）随着睡眠深度的变化而波动。
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