For the antenna array having a great quantity radiating elements, enormous cables are used. Thus, this system has bad reliability and maintainability.

对于单元数众多的天线阵列而言，这种排列方式意味着数量庞大的连接电缆，所带来的后果是系统可靠性降低，可维修性变差。

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Research on ignited biogas engines is insufficient in our country, which leads to serious problems of biogas engines such as high heat load, bad reliability and low efficiency.

国内对火花点火式沼气发动机的研究甚少，生产的沼气发动机在运行中出现热负荷高、可靠性与经济性差的问题。

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The traditional data acquisition and control system based on industry computer has complex circuit and bad reliability.

以工控机为基础的数据采集与控制系统是集中控制方式，线路比较复杂，可靠性比较差。

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