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发明名称
摘要
申请公布号
JPS574457(U)
申请公布日期
1982.01.11
申请号
JP19800080619U
申请日期
1980.06.10
申请人
发明人
分类号
E03B7/14;F16L55/00;(IPC1-7):E03B7/14
主分类号
E03B7/14
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