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发明名称
Indicator
摘要
申请公布号
US2273946(A)
申请公布日期
1942.02.24
申请号
US19390286806
申请日期
1939.07.27
申请人
GENERAL MOTORS CORPORATION
发明人
FICHTER LUDWIG J.
分类号
H03J5/12
主分类号
H03J5/12
代理机构
代理人
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