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发明名称
Drilling bit for construction work
摘要
申请公布号
US2859645(A)
申请公布日期
1958.11.11
申请号
US19570650905
申请日期
1957.04.05
申请人
THE CLEVELAND TWIST DRILL COMPANY
发明人
EMMONS JOSEPH V.;SMITH NORMAN A.
分类号
B23B51/02;B27G15/00
主分类号
B23B51/02
代理机构
代理人
主权项
地址
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