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发明名称
Letter scale
摘要
申请公布号
US2413166(A)
申请公布日期
1946.12.24
申请号
US19450577431
申请日期
1945.02.12
申请人
BOWMAN REGINALD M
发明人
BOWMAN REGINALD M.
分类号
G01G19/00
主分类号
G01G19/00
代理机构
代理人
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