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发明名称
Driving bushing for rotary tables
摘要
申请公布号
US2023796(A)
申请公布日期
1935.12.10
申请号
US19330657798
申请日期
1933.02.21
申请人
SORENSEN LEE S;ERNEST BECK
发明人
SORENSEN LEE S.;BECK ERNEST
分类号
E21B3/04
主分类号
E21B3/04
代理机构
代理人
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地址
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