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发明名称
Piezo electric oscillator
摘要
申请公布号
US1827196(A)
申请公布日期
1931.10.13
申请号
US19290359571
申请日期
1929.05.01
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
HEISING RAYMOND A.
分类号
H03B5/34
主分类号
H03B5/34
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