,申请号FRD1564523-传众专利搜索

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发明名称
摘要
申请公布号	FR1564523(A)	申请公布日期	1969.04.25
申请号	FRD1564523	申请日期	1967.12.13
申请人		发明人
分类号	E21D23/00;E21D23/04	主分类号	E21D23/00
代理机构		代理人
主权项
地址

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