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发明名称
Improvements in processes for recording electrical impulses
摘要
申请公布号
GB352727(A)
申请公布日期
1931.07.16
申请号
GB19300020434
申请日期
1930.07.05
申请人
MAX VOLMER
发明人
分类号
B41M5/20;H04N1/032;H04N1/23
主分类号
B41M5/20
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