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发明名称
Excavating machine
摘要
申请公布号
US1757908(A)
申请公布日期
1930.05.06
申请号
US19270203729
申请日期
1927.07.06
申请人
JOHNSTON CARLTON C
发明人
JOHNSTON CARLTON C.
分类号
E02F3/76
主分类号
E02F3/76
代理机构
代理人
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