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经营范围
发明名称
Masonry drills
摘要
申请公布号
US2856157(A)
申请公布日期
1958.10.14
申请号
US19550535008
申请日期
1955.09.19
申请人
NEW ENGLAND CARBIDE TOOL COMPANY, INC.
发明人
CHAPIN BERNARD L.;ALPER RALPH H.
分类号
B23B51/04
主分类号
B23B51/04
代理机构
代理人
主权项
地址
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