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发明名称
Improvements in fire escapes
摘要
申请公布号
GB359942(A)
申请公布日期
1931.10.28
申请号
GB19300022744
申请日期
1930.07.28
申请人
FRANZ HETZELBERGER
发明人
分类号
A62B5/00
主分类号
A62B5/00
代理机构
代理人
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