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发明名称
Propeller mit federnden Flügeln.
摘要
申请公布号
AT122045(B)
申请公布日期
1931.03.25
申请号
ATD122045
申请日期
1927.10.22
申请人
FRANZ MELCHER
发明人
FRANZ MELCHER
分类号
主分类号
代理机构
代理人
主权项
地址
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