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发明名称
Fire escape
摘要
申请公布号
US2492511(A)
申请公布日期
1949.12.27
申请号
US19460647470
申请日期
1946.02.14
申请人
YEHLING WILLIAM W
发明人
YEHLING WILLIAM W.
分类号
E06C9/08
主分类号
E06C9/08
代理机构
代理人
主权项
地址
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