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经营范围
发明名称
Depth-of-groove gauge
摘要
申请公布号
US2580445(A)
申请公布日期
1952.01.01
申请号
US19480010550
申请日期
1948.02.24
申请人
JOHN LONGWORTH
发明人
LONGWORTH JOHN
分类号
G01B5/18
主分类号
G01B5/18
代理机构
代理人
主权项
地址
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