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发明名称
摘要
申请公布号	JPS4417601(Y1)	申请公布日期	1969.07.30
申请号	JP19650048743U	申请日期	1965.06.15
申请人		发明人
分类号	E21C27/06;E21C25/08;(IPC1-7):E21C25/08	主分类号	E21C27/06
代理机构		代理人
主权项
地址

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