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发明名称
摘要
申请公布号
NL7201051(A)
申请公布日期
1972.12.07
申请号
NL19720001051
申请日期
1972.01.26
申请人
发明人
分类号
E04B5/48;E04G21/14;F24D3/14;(IPC1-7):E04G21/14
主分类号
E04B5/48
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