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发明名称
Improvements in draught-excluding devices
摘要
申请公布号
GB868842(A)
申请公布日期
1961.05.25
申请号
GB19560028090
申请日期
1956.09.14
申请人
CYRIL WILLIAM DOLMAN
发明人
分类号
E06B7/23
主分类号
E06B7/23
代理机构
代理人
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