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发明名称
摘要
申请公布号
NL7003156(A)
申请公布日期
1970.09.08
申请号
NL19700003156
申请日期
1970.03.05
申请人
发明人
分类号
E04F17/02;(IPC1-7):E04F17/02
主分类号
E04F17/02
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代理人
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地址
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