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发明名称
Turnstile
摘要
申请公布号
US1844784(A)
申请公布日期
1932.02.09
申请号
US19310548717
申请日期
1931.07.04
申请人
NAU HENRY A
发明人
NAU HENRY A.
分类号
G07F17/14
主分类号
G07F17/14
代理机构
代理人
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