,申请号JP19770004228U-传众专利搜索

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发明名称
摘要
申请公布号	JPS53100706(U)	申请公布日期	1978.08.15
申请号	JP19770004228U	申请日期	1977.01.19
申请人		发明人
分类号	E21B17/22;E02F3/06;(IPC1-7):E02F3/06;E02D17/144	主分类号	E21B17/22
代理机构		代理人
主权项
地址

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