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发明名称
Improvements in sound reproducing diaphragms and method of and means for producing the same
摘要
申请公布号
GB405979(A)
申请公布日期
1934.02.12
申请号
GB19320019606
申请日期
1932.07.11
申请人
JESSE BARNUM HAWLEY
发明人
分类号
H04R31/00
主分类号
H04R31/00
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