TOOL FOR DRILLING IN COAL BEDS,申请号SU19772559145-传众专利搜索

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发明名称	TOOL FOR DRILLING IN COAL BEDS
摘要
申请公布号	SU761694(A1)	申请公布日期	1980.09.07
申请号	SU19772559145	申请日期	1977.12.23
申请人	DO POLT INSTITUT	发明人	YUSHKOV ALEKSANDR S,SU;KOVALENKO ANATOLIJ ,SU;KORSAKOV ALEKSANDR D,SU
分类号	E21B10/00;(IPC1-7):E21B10/00	主分类号	E21B10/00
代理机构		代理人
主权项
地址

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