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发明名称
Screw thread testing device
摘要
申请公布号
US1808816(A)
申请公布日期
1931.06.09
申请号
US19240723122
申请日期
1924.06.30
申请人
PRATT & WHITNEY COMPANY
发明人
JOHNSON CHARLES G.
分类号
G01B5/20
主分类号
G01B5/20
代理机构
代理人
主权项
地址
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