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发明名称
摘要
申请公布号	NL6910901(A)	申请公布日期	1970.01.27
申请号	NL19690010901	申请日期	1969.07.15
申请人		发明人
分类号	F16L21/05;(IPC1-7):F16L21/02	主分类号	F16L21/05
代理机构		代理人
主权项
地址

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