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经营范围
发明名称
Centering pressure chuck
摘要
申请公布号
US2479405(A)
申请公布日期
1949.08.16
申请号
US19460659547
申请日期
1946.04.04
申请人
RAMSEY CHARLES R
发明人
RAMSEY CHARLES R.
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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