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发明名称
Improvements in light valves for photographically recording sound
摘要
申请公布号
GB475812(A)
申请公布日期
1937.11.25
申请号
GB19360014775
申请日期
1936.05.25
申请人
UNITED RESEARCH CORPORATION OF DELAWARE
发明人
分类号
E21D9/10;G11B7/00
主分类号
E21D9/10
代理机构
代理人
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