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经营范围
发明名称
Automatic chuck
摘要
申请公布号
US2453642(A)
申请公布日期
1948.11.09
申请号
US19470769513
申请日期
1947.08.18
申请人
EMIL ROY
发明人
ROY EMIL
分类号
B23B31/02;B23B31/06
主分类号
B23B31/02
代理机构
代理人
主权项
地址
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