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JPS6054198

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DESCRIPTION JPS6054198
[0001]
Brief description of the drawings
[0002]
FIG. 1 is an enlarged longitudinal sectional view showing an example in the case of using the
acoustic plate according to the present invention as a sound absorbing plate, FIG. 2 is an
enlarged view showing the surface condition of the microporous membrane, and FIG. It is a
longitudinal cross-sectional view at the time of using an acoustic board as a diaphragm. 1:
microporous membrane, 2: support plate, 3: through hole, 4: substrate, 5: magnet, 6: top plate, 7:
frame, 8: pole piece, 9: coil.
11-05-2019
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