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发明名称
摘要
申请公布号
FR1581766(A)
申请公布日期
1969.09.19
申请号
FRD1581766
申请日期
1968.08.01
申请人
发明人
分类号
F16L37/05;F16L37/10
主分类号
F16L37/05
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代理人
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地址
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