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发明名称	WELL SURVEYING DEVICE
摘要
申请公布号	CA310221(A)	申请公布日期	1931.04.07
申请号	CAD310221	申请日期
申请人	THE SPERRY-SUN WELL SURVEYING COMPANY	发明人	GEORGE ANTHONY SMITH
分类号		主分类号
代理机构		代理人
主权项
地址

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