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发明名称
Piezoelektrischer Schwingkristall im Vakuumgefaess mit verduennter Neon- oder Neon-Helium-Fuellung
摘要
申请公布号
DE506356(C)
申请公布日期
1930.09.04
申请号
DE1929T036456D
申请日期
1929.02.20
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
SCHROETER DR. FRITZ
分类号
H03H9/10
主分类号
H03H9/10
代理机构
代理人
主权项
地址
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