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发明名称
Observation device
摘要
申请公布号
US2229594(A)
申请公布日期
1941.01.21
申请号
US19380199240
申请日期
1938.03.31
申请人
HERMAN SEILER
发明人
SEILER HERMAN
分类号
E06B7/30
主分类号
E06B7/30
代理机构
代理人
主权项
地址
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