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发明名称
BOREHOLE EXTENSOMETER
摘要
申请公布号
US3483745(A)
申请公布日期
1969.12.16
申请号
USD3483745
申请日期
1964.12.11
申请人
PATRICK HARRISON INC.
发明人
HORST UBLACKER
分类号
E21B49/00;(IPC1-7):E21B47/00;G01N3/00
主分类号
E21B49/00
代理机构
代理人
主权项
地址
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