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发明名称
Dental X-ray focusing instrument
摘要
申请公布号
US1923669(A)
申请公布日期
1933.08.22
申请号
US19320629782
申请日期
1932.08.22
申请人
HARRISON HENRY H
发明人
HARRISON HENRY H.
分类号
G03B42/04
主分类号
G03B42/04
代理机构
代理人
主权项
地址
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