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发明名称
SPOOL
摘要
申请公布号
CA372650(A)
申请公布日期
1938.03.22
申请号
CAD372650
申请日期
申请人
HUBBARD SPOOL COMPANY
发明人
HILYARD C. HOWSAM
分类号
主分类号
代理机构
代理人
主权项
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