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发明名称	Whipstock
摘要
申请公布号	US1812880(A)	申请公布日期	1931.07.07
申请号	US19280253886	申请日期	1928.02.13
申请人	FRANK KINZBACH;WHEELER HARVE M	发明人	KINZBACH FRANK;WHEELER HARVE M.
分类号	E21B7/06	主分类号	E21B7/06
代理机构		代理人
主权项
地址

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