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经营范围
发明名称
Mining cutter
摘要
申请公布号
US2148309(A)
申请公布日期
1939.02.21
申请号
US19370172942
申请日期
1937.11.05
申请人
HENRY STEPHENS
发明人
STEPHENS HENRY
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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