Perfectionnements apportés aux perforatrices à charbon,申请号FRD923310-传众专利搜索

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发明名称	Perfectionnements apportés aux perforatrices à charbon
摘要
申请公布号	FR923310(A)	申请公布日期	1947.07.03
申请号	FRD923310	申请日期	1946.02.18
申请人		发明人	BAILLIE SAMUEL
分类号	E21B7/02	主分类号	E21B7/02
代理机构		代理人
主权项
地址

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