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经营范围
发明名称
Nasality meter
摘要
申请公布号
US3281534(A)
申请公布日期
1966.10.25
申请号
US19630279154
申请日期
1963.05.09
申请人
DERSCH WILLIAM C
发明人
DERSCH WILLIAM C.
分类号
G10L11/00
主分类号
G10L11/00
代理机构
代理人
主权项
地址
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