Trépan perfectionné pour le forage du sol,申请号FR19620889572-传众专利搜索

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发明名称	Trépan perfectionné pour le forage du sol
摘要
申请公布号	FR1316351(A)	申请公布日期	1963.01.25
申请号	FR19620889572	申请日期	1962.02.28
申请人	DIAMANT BOART SOCIETE ANONYME	发明人
分类号	E21B10/04;E21B10/48	主分类号	E21B10/04
代理机构		代理人
主权项
地址

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