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发明名称
Safety guard
摘要
申请公布号
US2167292(A)
申请公布日期
1939.07.25
申请号
US19380220989
申请日期
1938.07.23
申请人
CATANZARO FRANK J
发明人
CATANZARO FRANK J.
分类号
E01F15/14
主分类号
E01F15/14
代理机构
代理人
主权项
地址
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