Diaphragm

Details Diaphragm Diaphragm

H - Electricity

04

R

181/6

H04R 7/10 (2006.01) H04R 7/02 (2006.01)

Patent

CA 1253085

ABSTRACT OF THE DISCLOSURE A diaphragm using a metal material applied with anodic oxide films, in which said metal material contains one of lead compounds, inorganic metal compounds and phosphor compounds at least to a portion in the micropores of the anodic oxide film.

492055

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