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发明名称
Improvements in and relating to safety shutters for windows and other apertures
摘要
申请公布号
GB576202(A)
申请公布日期
1946.03.22
申请号
GB19440007789
申请日期
1944.04.26
申请人
FRANK GORDON DONALDSON
发明人
分类号
G03B21/18
主分类号
G03B21/18
代理机构
代理人
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