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发明名称
Closure operator
摘要
申请公布号
US1749425(A)
申请公布日期
1930.03.04
申请号
US19260088277
申请日期
1926.02.15
申请人
HARRIS MARCUS R
发明人
HARRIS MARCUS R.
分类号
E05F11/04
主分类号
E05F11/04
代理机构
代理人
主权项
地址
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