... atomic oxygen triplet 氧原子三重线 audio frequency magnetic field method 音频磁场法 aurora borealis 北极光 ...
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In the design, in view of the breakdown different form, has studied the sound detection law, the pulse magnetic field law, the audio frequency induction method and so on each method principle.
在设计中，针对故障的不同形式，研究了声测法、脉冲磁场法、音频感应法等各种方法的原理。
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