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发明名称
Expandable core-former
摘要
申请公布号
US3266767(A)
申请公布日期
1966.08.16
申请号
US19650473045
申请日期
1965.07.19
申请人
LONG LEONARD D
发明人
LONG LEONARD D.
分类号
B28B7/30
主分类号
B28B7/30
代理机构
代理人
主权项
地址
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