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发明名称
Threshold
摘要
申请公布号
US1840879(A)
申请公布日期
1932.01.12
申请号
US19300462041
申请日期
1930.06.18
申请人
BARRINGER ELMER D
发明人
BARRINGER ELMER D.
分类号
E06B1/70
主分类号
E06B1/70
代理机构
代理人
主权项
地址
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