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发明名称
摘要
申请公布号
LU59258(A1)
申请公布日期
1970.01.01
申请号
LUD59258
申请日期
1969.08.08
申请人
发明人
分类号
E03C1/122;F16L41/02
主分类号
E03C1/122
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