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发明名称
Clapper block
摘要
申请公布号
US2539878(A)
申请公布日期
1951.01.30
申请号
US19470745518
申请日期
1947.05.02
申请人
THE G. A. GRAY COMPANY
发明人
WALTER JOHN M.
分类号
B23D13/00
主分类号
B23D13/00
代理机构
代理人
主权项
地址
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