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发明名称
Lock-nut
摘要
申请公布号
GB328783(A)
申请公布日期
1930.05.08
申请号
GB19290012724
申请日期
1929.04.24
申请人
CARL STEINBACH
发明人
分类号
E01B11/38
主分类号
E01B11/38
代理机构
代理人
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