Шарошечное долото с резиновыми опорами для бурения скважин,申请号SU19490403096-传众专利搜索

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发明名称	Шарошечное долото с резиновыми опорами для бурения скважин
摘要
申请公布号	SU90301(A1)	申请公布日期	1949.11.30
申请号	SU19490403096	申请日期	1949.08.22
申请人	KISELEV D.K.	发明人	KISELEV D.K.
分类号	E21B10/22	主分类号	E21B10/22
代理机构		代理人
主权项
地址

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