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发明名称
Pneumatic door operating device
摘要
申请公布号
US2550349(A)
申请公布日期
1951.04.24
申请号
US19490099660
申请日期
1949.06.17
申请人
HELZ PHILIP C
发明人
HELZ PHILIP C.
分类号
E05F15/04
主分类号
E05F15/04
代理机构
代理人
主权项
地址
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