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摘要
申请公布号
US2502680(A)
申请公布日期
1950.04.04
申请号
US19450603634
申请日期
1945.07.07
申请人
STEWART HENRY P
发明人
STEWART HENRY P.
分类号
G01G19/00
主分类号
G01G19/00
代理机构
代理人
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