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发明名称
Improvements relating to pressure measuring devices
摘要
申请公布号
GB928981(A)
申请公布日期
1963.06.19
申请号
GB19610036769
申请日期
1961.10.13
申请人
DONALD SHIELDS
发明人
分类号
E21B47/06
主分类号
E21B47/06
代理机构
代理人
主权项
地址
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