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发明名称
Improvement in door checks
摘要
申请公布号
GB333068(A)
申请公布日期
1930.08.07
申请号
GB19290026351
申请日期
1929.08.29
申请人
ALBERT CLIFFORD EARHART
发明人
分类号
B61H7/02;E05C17/20
主分类号
B61H7/02
代理机构
代理人
主权项
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