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发明名称
Perspective demonstrator
摘要
申请公布号
US2711022(A)
申请公布日期
1955.06.21
申请号
US19520313424
申请日期
1952.10.07
申请人
SALFELDER EVERETT L
发明人
SALFELDER EVERETT L.
分类号
B43L13/14
主分类号
B43L13/14
代理机构
代理人
主权项
地址
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