... HEX hex Hexagonal or Hexagon 六角（边）形（的） HF High Frequency 高频, 短波（台） HG Mercury 水银（柱） ...
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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。
Owing to the decametric wavelength, the angular resolution of High Frequency Surface Wave OTH Radar (HF SWOTHR) is usually coarse especially when dimensions of antenna array are restricted.
由于工作在高频段，高频地波超视距雷达的角分辨力较差，尤其是当阵长受限时。
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