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发明名称
Seismograph timing devices
摘要
申请公布号
US2717821(A)
申请公布日期
1955.09.13
申请号
US19480034325
申请日期
1948.06.21
申请人
TEXAS INSTRUMENTS INCORPORATED
发明人
JR. EDWARD GORDON PERRY,
分类号
G01V1/24
主分类号
G01V1/24
代理机构
代理人
主权项
地址
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