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发明名称
Beidweg-Gleichrichterröhre.
摘要
申请公布号
CH161423(A)
申请公布日期
1933.04.30
申请号
CHD161423
申请日期
1931.11.16
申请人
BELL TELEPHONE MANUFACTURING CO. S. A.
发明人
BELL TELEPHONE MANUFACTURING CO. S. A.
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