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发明名称
Shutter construction and operator
摘要
申请公布号
US2645828(A)
申请公布日期
1953.07.21
申请号
US19500185639
申请日期
1950.09.19
申请人
DAVIS ROY A
发明人
DAVIS ROY A.
分类号
E06B7/084
主分类号
E06B7/084
代理机构
代理人
主权项
地址
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