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发明名称
摘要
申请公布号
JPS5228808(Y2)
申请公布日期
1977.07.01
申请号
JP19720037401U
申请日期
1972.03.29
申请人
发明人
分类号
F16L23/024;F16L23/02;F16L23/026;F16L23/028;(IPC1-7):F16L23/02
主分类号
F16L23/024
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