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发明名称
摘要
申请公布号
NL6919357(A)
申请公布日期
1971.06.28
申请号
NL19690019357
申请日期
1969.12.24
申请人
发明人
分类号
F16L39/00;(IPC1-7):F16L39/00
主分类号
F16L39/00
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代理人
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地址
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