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JPS60174394

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DESCRIPTION JPS60174394
[0001]
Brief description of the drawings
[0002]
1a and 1b are a half sectional view and a side view of a movable coil, FIG. 2 is a microphone
sectional view of the present invention, FIG. 3a and by c are sectional views for explaining a
conventional example, and FIG. 5A and 5B are a half sectional view and a side view of another
embodiment of a movable coil according to the present invention, and FIGS. 5A and 5B are
directional frequency characteristic diagrams. 50 100 200 500 cycles: 2K 5K l0Kr number 2)
03-05-2019
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