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发明名称
摘要
申请公布号
NL6710603(A)
申请公布日期
1969.02.04
申请号
NL19670010603
申请日期
1967.08.01
申请人
发明人
分类号
F16L17/025;F16L49/02
主分类号
F16L17/025
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