The current-conducting plate is overlapped on the upper surface of the diaphragm body and provided with a plurality of openings.
第一导电板，该第一导电板迭设于所述薄膜主体的上表面上，且具多个开口；
The current-conducting plate is overlapped on the upper surface of the diaphragm body and provided with a plurality of openings.
第一导电板，该第一导电板迭设于所述薄膜主体的上表面上，且具多个开口；
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