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发明名称
Chuck
摘要
申请公布号
US2253345(A)
申请公布日期
1941.08.19
申请号
US19390289770
申请日期
1939.08.12
申请人
PALMGREN CARL A
发明人
PALMGREN CARL A.
分类号
B23B31/12
主分类号
B23B31/12
代理机构
代理人
主权项
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