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Brief description of the drawings
FIG. 1 is a sectional view of a conventional apparatus, FIG. 2 is a sectional view showing an
embodiment of the present invention, FIG. 3 is a front view, FIG. 4 is a rear view, and FIG. 6 is an
enlarged perspective view of the main part, FIG. 7 is a front view of the substrate, FIG. 8a is a
rear view showing another embodiment of the present invention, and the same part is cut out in
the same figure. It is a bottom view shown. 2 ... speaker (horn speaker), 4 ... mounting portion, 4a
... inclined surface, 6 ... fin. Figure 1 Figure 6