无电磁干扰，高功率因数。寿命达5万小时以上。
No elector magnetism interference, high power factor. lifespan is on average over 50000 hours.
本发明结构简单、无电磁干扰、易于实现结构上的小型化、集成化。
The invention has simple structure and no electromagnetic interference and is easy for realizing the miniaturization and the integration in structure.
现场存储方式实时保存试验数据，实验结束后再读取和处理数据，无电磁干扰途径。
The field testing with digital storage saved test data in time not to be affected by EMI. The data were accessed and processed by a computer after the launch experiment.
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