METHOD OF EXCAVATING ROCK-BED,申请号JP19810209725-传众专利搜索

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发明名称	METHOD OF EXCAVATING ROCK-BED
摘要
申请公布号	JPS58113496(A)	申请公布日期	1983.07.06
申请号	JP19810209725	申请日期	1981.12.28
申请人	HOSHINO KENZOU	发明人	HOSHINO KENZOU
分类号	E21B7/18;E21D9/10	主分类号	E21B7/18
代理机构		代理人
主权项
地址

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