2.1 Maximum Warranty Period: Within 12 months from the date of picking up the machine, the user will go to the special maintenance station of Tenjin UAV Technology Co., Ltd. for free and strong protection according to the requirements. After being identified, it belongs to the quality accident within the scope of “Three Guaranteesâ€. The company is responsible for the implementation of the "three guarantees" service;
2.2 Tianshen UAV Technology Co., Ltd. is an authorized special maintenance station located in the domestic after-sales service. It is entrusted by the company to accept the quality “three guarantees†service of Tianshen UAV Technology Co., Ltd. The department submitted a warranty application. If you disagree with the judgment made by the special service station that you provide the service, you can request a re-examination from the headquarters of Tenjin UAV Technology Co., Ltd.;
With the rapid development of mobile communication equipment, in the mobile communications network engineering design, according to the requirements of the network coverage, traffic distribution, anti-interference requirements and network service quality and so on the actual situation to select the base station antenna, the communication base station antenna is currently on the market work the characteristics of the narrow frequency band, such as directional literal outdoor antenna, The operating frequency band is 860~960Mhz. Those multi-band antennas have the characteristics of high manufacturing cost and complex structure. With the development of communication technology, especially the popularization of 3G communication technology, such antennas are difficult to meet the market requirements. Therefore, to avoid the above problems, it is necessary to provide a base station antenna that is simple to manufacture, low cost, and reliable in performance to overcome the alleged defects in prior art.
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