BLASTHOLE DRILLING DEVICE,申请号SU19772517515-传众专利搜索

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发明名称	BLASTHOLE DRILLING DEVICE
摘要
申请公布号	SU692999(A1)	申请公布日期	1979.10.25
申请号	SU19772517515	申请日期	1977.08.22
申请人	VNII NERUDNYKH STROITELNYKH MATERIALOV GIDROMEKHANIZATSII	发明人	BULAVTSEV VLADIMIR A,SU;DUBOVIK SERGEJ G,SU;ZHIDKOV ANATOLIJ V,SU
分类号	E21B15/00;(IPC1-7):E21C11/02	主分类号	E21B15/00
代理机构		代理人
主权项
地址

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