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发明名称
Seismic signal amplifying system
摘要
申请公布号
US2611024(A)
申请公布日期
1952.09.16
申请号
US19460698343
申请日期
1946.09.20
申请人
SEISMOGRAPH SERVICE CORPORATION
发明人
HAWKINS JAMES E.
分类号
G01V1/22
主分类号
G01V1/22
代理机构
代理人
主权项
地址
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