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发明名称
Boring apparatus
摘要
申请公布号
US2439492(A)
申请公布日期
1948.04.13
申请号
US19450630454
申请日期
1945.11.23
申请人
GILBERT SHARRATT JOHN;GORDON SHARRATT ALBERT
发明人
SHARRATT JOHN GILBERT;SHARRATT ALBERT GORDON
分类号
B23Q9/00
主分类号
B23Q9/00
代理机构
代理人
主权项
地址
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