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发明名称
Kääntöporras
摘要
申请公布号
FI894706(A)
申请公布日期
1991.04.05
申请号
FI19890004706
申请日期
1989.10.04
申请人
RIIHIMAEKI, JUHA
发明人
RIIHIMAEKI, JUHA
分类号
E04F11/02;E04F11/025;(IPC1-7):E04F/
主分类号
E04F11/02
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代理人
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