针对这种压电换能器结构，深入研究了SH波的激发和辐射特性。

The SH wave is studied for the structure of this piezoelectric transducer.

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但完成该过程，你不能缺少一台叫做‘压电式换能器’的设备。

To do all this, though, you need a device called a transducer.

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但完成该过程，你不能缺少一台叫做‘压电式换能器’的设备。

To do all this, though, you need a device called a transducer.

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