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发明名称
Spring spreader
摘要
申请公布号
US2259533(A)
申请公布日期
1941.10.21
申请号
US19390249887
申请日期
1939.01.09
申请人
BLACKHAWK MFG. CO.
发明人
PFAUSER EDWARD M.
分类号
B25B27/30
主分类号
B25B27/30
代理机构
代理人
主权项
地址
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