Straight pull automatic rotary jar for use in well drilling operations,申请号GB19360026444-传众专利搜索

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发明名称	Straight pull automatic rotary jar for use in well drilling operations
摘要
申请公布号	GB475004(A)	申请公布日期	1937.11.11
申请号	GB19360026444	申请日期	1936.09.29
申请人	JULIUS S. BECK	发明人
分类号	E21B31/107	主分类号	E21B31/107
代理机构		代理人
主权项
地址

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