DEVICE OF MAKING EXCAVATING HOLE DEEP,申请号JP19770132407-传众专利搜索

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发明名称	DEVICE OF MAKING EXCAVATING HOLE DEEP
摘要
申请公布号	JPS5366802(A)	申请公布日期	1978.06.14
申请号	JP19770132407	申请日期	1977.11.04
申请人	JOHANSSON SVEN HALVOR	发明人	JOHANSSON SVEN HALVOR
分类号	E21B4/02;E21B4/18;E21B4/20;E21B21/16;E21B33/072;E21C	主分类号	E21B4/02
代理机构		代理人
主权项
地址

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