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Clip
摘要
申请公布号
US2389964(A)
申请公布日期
1945.11.27
申请号
US19420464565
申请日期
1942.11.05
申请人
ECKEL OLIVER C
发明人
ECKEL OLIVER C.
分类号
E04B9/22
主分类号
E04B9/22
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