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发明名称
Improvements in and relating to the manufacture of hollow drill steel or other hollow bars
摘要
申请公布号
GB425134(A)
申请公布日期
1935.03.07
申请号
GB19330029759
申请日期
1933.10.26
申请人
REGINALD ASLINE BEDFORD
发明人
分类号
B23P11/00
主分类号
B23P11/00
代理机构
代理人
主权项
地址
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