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发明名称
Feeding mechanism
摘要
申请公布号
US1754159(A)
申请公布日期
1930.04.08
申请号
US19210435764
申请日期
1921.01.07
申请人
SULLIVAN MACHINERY COMPANY
发明人
BANKS ROBERT T.
分类号
E21B19/086
主分类号
E21B19/086
代理机构
代理人
主权项
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