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发明名称
Clef
摘要
申请公布号
FR684728(A)
申请公布日期
1930.06.30
申请号
FRD684728
申请日期
1929.11.12
申请人
发明人
DEPRET YVES-CONSTANT
分类号
B25B13/16
主分类号
B25B13/16
代理机构
代理人
主权项
地址
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