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经营范围
发明名称
Cutter bit and chuck
摘要
申请公布号
US1920035(A)
申请公布日期
1933.07.25
申请号
US19320590468
申请日期
1932.02.02
申请人
STEPHENS THOMAS M
发明人
STEPHENS THOMAS M.
分类号
E21C35/19;E21C35/193
主分类号
E21C35/19
代理机构
代理人
主权项
地址
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