| http://www.w3.org/ns/prov#value | - FIG. 3 and FIG. 4 show a standard fixed electrode condenser-type microphone detector constructed using a diaphragm according to the present invention, and in this standard detector is a standard electrode constituted by a fixed electrode 1 having a fixed electrode plate 1B provided with a large number of air holes 1C aligned with air holes 1B in a first electrode-supporting base 1A which is a s
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