Lighting and static electricity are unavoidable to tethered aerostat at high altitude, and equipments of measurement and control system at the outside of balloon may be damaged; therefore special protection measures should be taken to protect these equipments operate safely.%处于高空中的系留气球不可避免的存在着雷电与静电危害，会对测控系统位于球囊外的电子设备造成损坏，所以有必要对此类设备进行专门的防护，保证设备能安全工作。
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