ROCK ROLLER BIT,申请号SU19772460426-传众专利搜索

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发明名称	ROCK ROLLER BIT
摘要
申请公布号	SU630393(A1)	申请公布日期	1978.10.30
申请号	SU19772460426	申请日期	1977.03.09
申请人	INST GEOTEKHNICHESKOI MEKHANI	发明人	POTURAEV VALENTIN N,SU;SHULYAK IGOR A,SU;STEPANYUK ANATOLIJ ,SU;KOVALCHUK VLADIMIR A,SU
分类号	(IPC1-7):E21B9/08	主分类号	(IPC1-7):E21B9/08
代理机构		代理人
主权项
地址

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