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经营范围
发明名称
Masonry drill
摘要
申请公布号
US2728558(A)
申请公布日期
1955.12.27
申请号
US19520295760
申请日期
1952.06.26
申请人
NEW ENGLAND CARBIDE TOOL COMPANY, INC.
发明人
TENGBERG EVERT R.
分类号
B28D1/14
主分类号
B28D1/14
代理机构
代理人
主权项
地址
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