Shortwave communication plays a vital role in long haul communications, on account of its unique merits such as low cost, convenience to be generated and strong resistance to damage.
短波通信具有成本低、架设灵活、抗毁能力强等优点，在远距离通信中起着举足轻重的作用。
For the new contract, Dell Perot Systems will continue to provide network operations, desktop services, email, information assurance, telephones, and connectivity to long-haul communications.
根据新的合同，戴尔perot系统公司将继续提供网络运营、桌面服务、电子邮件、信息安全保障、电话和长途通信。
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。
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