烟雾浓度和平均粒径是烟雾的两个重要特性参数，是早期火灾探测的基础。
The concentration and the mean particle size of smoke are of primary importance in early fire detection.
针对大空间新型消防报警系统设计的具体问题，提出了相应的解决方案。大空间新型消防报警系统的实施提高了早期火灾探测和报警的可靠性。
In order to resolve the problems that came from the new fire control system in large space, some projects were put forward, which improved the reliability of early fire detecting and alarming system.
火灾的早期探测是较为复杂且具有重要意义的研究课题。
The detection of fire is complex and significant in its early age.
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