前凹型脊椎 [古生] procoelous
前凹型椎体 procoelous centrum
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本文用有限元法对凹型弯张换能器的前三个共振频率和振动方式进行计算，与测量值比较并讨论了作为水下宽带声源的优点。
The first three resonant frequencies and vibration modes of a novel flextensional transducer are calculated by finite element method, and compared with measured values.
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