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发明名称
UN DISPOSITIVO DE ESCALON TRAPADOR PARA UN POZO VISITABLE O SIMILAR.
摘要
申请公布号
ES492981(D0)
申请公布日期
1981.12.16
申请号
ES19810004929
申请日期
1980.07.01
申请人
KELLER GUSTAV;ENSSLE GERHARD
发明人
分类号
E06C9/04;(IPC1-7):06C9/04
主分类号
E06C9/04
代理机构
代理人
主权项
地址
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