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发明名称
DOUBLE CONE PRESSUREMETER
摘要
申请公布号
GB9008487(D0)
申请公布日期
1990.06.13
申请号
GB19900008487
申请日期
1990.04.17
申请人
CORKE, DAVID J
发明人
分类号
E21B49/00;G01N33/24
主分类号
E21B49/00
代理机构
代理人
主权项
地址
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