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发明名称
Erection apparatus
摘要
申请公布号
US2794687(A)
申请公布日期
1957.06.04
申请号
US19530369107
申请日期
1953.07.20
申请人
ALLEN HARLAN CAMPBELL;HARLAN JOHN M
发明人
HARLAN CAMPBELL ALLEN;HARLAN JOHN M.
分类号
H01J9/00
主分类号
H01J9/00
代理机构
代理人
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地址
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