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发明名称
Plural surface sleeve board
摘要
申请公布号
US2620578(A)
申请公布日期
1952.12.09
申请号
US19510220651
申请日期
1951.04.12
申请人
FLETCHER DAVID F
发明人
FLETCHER DAVID F.
分类号
D06F81/12
主分类号
D06F81/12
代理机构
代理人
主权项
地址
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