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发明名称
摘要
申请公布号	GB1229675(A)	申请公布日期	1971.04.28
申请号	GBD1229675	申请日期	1968.05.02
申请人		发明人
分类号	F16L19/06;F16L19/08	主分类号	F16L19/06
代理机构		代理人
主权项
地址

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