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发明名称
Improvements in or relating to wave signalling systems
摘要
申请公布号
GB357085(A)
申请公布日期
1931.09.07
申请号
GB19300014089
申请日期
1930.05.07
申请人
GEORGE PRIECHENFRIED;JAMES ROBINSON
发明人
分类号
H03H9/48
主分类号
H03H9/48
代理机构
代理人
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地址
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