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发明名称
Machinist's precision level
摘要
申请公布号
US2316777(A)
申请公布日期
1943.04.20
申请号
US19400349133
申请日期
1940.08.01
申请人
FELL WILLIAM B
发明人
FELL WILLIAM B.
分类号
G01C9/30;G01C9/36
主分类号
G01C9/30
代理机构
代理人
主权项
地址
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