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发明名称
Temperature control system for frequency determining elements
摘要
申请公布号
US1831151(A)
申请公布日期
1931.11.10
申请号
US19290356281
申请日期
1929.04.18
申请人
WALKER GUY P
发明人
WALKER GUY P.
分类号
G05D23/275
主分类号
G05D23/275
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代理人
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