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发明名称
Extra-oral dental retractor
摘要
申请公布号
US3137941(A)
申请公布日期
1964.06.23
申请号
US19610113755
申请日期
1961.05.31
申请人
ANDREWS LAWRENCE F
发明人
ANDREWS LAWRENCE F.
分类号
A61C7/06
主分类号
A61C7/06
代理机构
代理人
主权项
地址
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