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发明名称
Door guard
摘要
申请公布号
US1849951(A)
申请公布日期
1932.03.15
申请号
US19290412837
申请日期
1929.12.09
申请人
CHICAGO RAILWAY EQUIPMENT COMPANY
发明人
NELSON ROY A.
分类号
B61D19/00
主分类号
B61D19/00
代理机构
代理人
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