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发明名称
Improvements in smoke detectors
摘要
申请公布号
GB315423(A)
申请公布日期
1930.11.12
申请号
GB19290021547
申请日期
1929.07.12
申请人
GEORGE MATTHEW MARR;ARTHUR PHELPS MARR
发明人
分类号
G01N27/12
主分类号
G01N27/12
代理机构
代理人
主权项
地址
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