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PCE
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CPC Subgroup
H04R 7/26

Damping by means acting directly on free portion of diaphragm or cone (air damping H04R1/28)

Full Title

Diaphragms for electromechanical transducers (in general F16J3/00); Cones (for musical instruments G10 ) > Damping by means acting directly on free portion of diaphragm or cone (air damping H04R1/28)