HAMMER DRILLS FOR MAKING BOREHOLES,申请号ZA19880002760-传众专利搜索

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发明名称	HAMMER DRILLS FOR MAKING BOREHOLES
摘要
申请公布号	ZA8802760(B)	申请公布日期	1988.10.21
申请号	ZA19880002760	申请日期	1988.04.20
申请人	MELVYN SAMUEL JAMES ENNIS	发明人	MELVYN SAMUEL JAMES ENNIS
分类号	E21B;E21C	主分类号	E21B
代理机构		代理人
主权项
地址

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