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经营范围
发明名称
Excavator scoop
摘要
申请公布号
US1783831(A)
申请公布日期
1930.12.02
申请号
US19260111002
申请日期
1926.05.22
申请人
KEYSTONE DRILLER COMPANY
发明人
DOWNIE ROBERT REX
分类号
E02F3/40
主分类号
E02F3/40
代理机构
代理人
主权项
地址
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