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经营范围
发明名称
Multiple auger assembly
摘要
申请公布号
US3406767(A)
申请公布日期
1968.10.22
申请号
US19660589449
申请日期
1966.10.25
申请人
JAMES P. WATTS
发明人
WATTS JAMES P.
分类号
E02F3/06;E02F5/02;E21B7/00
主分类号
E02F3/06
代理机构
代理人
主权项
地址
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