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发明名称
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摘要
申请公布号
US2525222(A)
申请公布日期
1950.10.10
申请号
US19470774200
申请日期
1947.09.16
申请人
HOLT THURMAN M
发明人
HOLT THURMAN M.
分类号
B25B13/48
主分类号
B25B13/48
代理机构
代理人
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