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发明名称
Digging implement
摘要
申请公布号
US2371563(A)
申请公布日期
1945.03.13
申请号
US19430401639
申请日期
1943.06.21
申请人
WALTER LEO N
发明人
WALTER LEO N.
分类号
A01C5/02;E21B11/00
主分类号
A01C5/02
代理机构
代理人
主权项
地址
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