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发明名称
Guard or protective device for trees or hydrants
摘要
申请公布号
US2121379(A)
申请公布日期
1938.06.21
申请号
US19360096068
申请日期
1936.08.14
申请人
YOUNG DAVID H
发明人
YOUNG DAVID H.
分类号
E01F9/017;E01F15/14
主分类号
E01F9/017
代理机构
代理人
主权项
地址
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