METHOD AND APPARATUS FOR MEASURING IN SITU THE EARTH STRESS AT A PRESELECTED SUBTERRANEAN AREA,申请号USD3557886-传众专利搜索

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发明名称	METHOD AND APPARATUS FOR MEASURING IN SITU THE EARTH STRESS AT A PRESELECTED SUBTERRANEAN AREA
摘要
申请公布号	US3557886(A)	申请公布日期	1971.01.26
申请号	USD3557886	申请日期	1969.06.30
申请人	FENIX & SCISSON INC.	发明人	JAMES H. COBBS
分类号	E21B49/00;E21F17/18;G01B7/16;(IPC1-7):E21B47/12;G01B5/30	主分类号	E21B49/00
代理机构		代理人
主权项
地址

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