For years, Allen and colleagues have been developing an earthquake early-warning system in California, placing instruments in many of the state's fault lines.

多年来，艾伦和她的同事们一直研发加州地震早期预测系统，该系统将一些仪器安放在本州易发地震的断裂带上。

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Cable fault on-line monitoring and fire pre-warning system is specially developed for pre venting cable channel fire.

电缆故障在线监测及火灾预警系统是为防治电缆沟、槽火灾而专门开发研制的。

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The pilots also received a warning that there was a fault in the battery system.

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