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经营范围
发明名称
Threading block
摘要
申请公布号
US2341848(A)
申请公布日期
1944.02.15
申请号
US19410424686
申请日期
1941.12.29
申请人
DRAPER CORPORATION
发明人
SNOW ISAAC
分类号
D03J5/00
主分类号
D03J5/00
代理机构
代理人
主权项
地址
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