The piezoceramic round disc, the matching layer for air, the perfusion layer, the casing and the shielding layer adopt a central rotational symmetry structure.
所述的压电陶瓷圆片、空气用匹配层、灌注层、外壳和屏蔽层均为中心旋转对称结构。
The piezoceramic round disc, the matching layer for air, the perfusion layer, the casing and the shielding layer adopt a central rotational symmetry structure.
所述的压电陶瓷圆片、空气用匹配层、灌注层、外壳和屏蔽层均为中心旋转对称结构。
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