LARGE DIAMETER DRILLED HOLE AND TAPER DRILLED HOLE DEVICE BY ROCK DRILL,申请号JP19770029921-传众专利搜索

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发明名称	LARGE DIAMETER DRILLED HOLE AND TAPER DRILLED HOLE DEVICE BY ROCK DRILL
摘要
申请公布号	JPS53114703(A)	申请公布日期	1978.10.06
申请号	JP19770029921	申请日期	1977.03.18
申请人	TERANISHI TOYOSHIGE	发明人	TERANISHI TOYOSHIGE
分类号	E21B7/28	主分类号	E21B7/28
代理机构		代理人
主权项
地址

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Verbindungsanordnung