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发明名称
Arc-measuring instrument
摘要
申请公布号
US2878566(A)
申请公布日期
1959.03.24
申请号
US19570667157
申请日期
1957.06.21
申请人
MELLEN ARTHUR J
发明人
MELLEN ARTHUR J.
分类号
G01B3/12
主分类号
G01B3/12
代理机构
代理人
主权项
地址
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