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发明名称
Concrete drill bit guide and dust remover
摘要
申请公布号
US3351143(A)
申请公布日期
1967.11.07
申请号
US19650460312
申请日期
1965.06.01
申请人
SEIBOLD ALVIN V;SHIRLEY HORACE E
发明人
SEIBOLD ALVIN V.;SHIRLEY HORACE E.
分类号
B23Q11/00
主分类号
B23Q11/00
代理机构
代理人
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