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发明名称
Center testing indicator
摘要
申请公布号
US1936160(A)
申请公布日期
1933.11.21
申请号
US19300456706
申请日期
1930.05.28
申请人
GEORGE THEODORE H
发明人
GEORGE THEODORE H.
分类号
主分类号
代理机构
代理人
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地址
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