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发明名称
摘要
申请公布号	BE647238(A)	申请公布日期	1964.08.17
申请号	BE19640647238	申请日期	1964.04.28
申请人		发明人
分类号	E01B7/26	主分类号	E01B7/26
代理机构		代理人
主权项
地址

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