While performing the seismic modelling experiment, it needs to have tens to hundreds of kilohertz and well-distributed orientation-dependent narrow pulse acoustic wave as simulation source.
在地震模型实验中，需要获得几十至几百千赫的、方向性较均匀的窄脉冲声波作为模拟震源。
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Many planets here indicate a need to achieve and be recognized as an important person, a strong father orientation, or to have others dependent on us.