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经营范围
发明名称
Excavators
摘要
申请公布号
US3143229(A)
申请公布日期
1964.08.04
申请号
US19620207946
申请日期
1962.07.06
申请人
BILLINGS ROY O
发明人
BILLINGS ROY O.
分类号
E02F3/413
主分类号
E02F3/413
代理机构
代理人
主权项
地址
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