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发明名称
摘要
申请公布号	GB1296950(A)	申请公布日期	1972.11.22
申请号	GBD1296950	申请日期	1971.10.13
申请人		发明人
分类号	B23F21/03;B24B33/08	主分类号	B23F21/03
代理机构		代理人
主权项
地址

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