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发明名称
System for simultaneously perforating and re-enforcing the hole so made in sheet material for filing purposes
摘要
申请公布号
US3226283(A)
申请公布日期
1965.12.28
申请号
US19620201617
申请日期
1962.06.11
申请人
PRIETO VILLALON ROBERTO
发明人
VILLALON ROBERTO PRIETO
分类号
B26D7/34
主分类号
B26D7/34
代理机构
代理人
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地址
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