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发明名称
Collet
摘要
申请公布号
US2291398(A)
申请公布日期
1942.07.28
申请号
US19390305295
申请日期
1939.11.20
申请人
MARTIN STODDARD B
发明人
MARTIN STODDARD B.
分类号
B23B31/20
主分类号
B23B31/20
代理机构
代理人
主权项
地址
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