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发明名称
Apparatus for automatically controlling duration of electrical current
摘要
申请公布号
US2452537(A)
申请公布日期
1948.11.02
申请号
US19460661041
申请日期
1946.04.10
申请人
ANDERSON RALPH V
发明人
ANDERSON RALPH V.
分类号
G04C3/06
主分类号
G04C3/06
代理机构
代理人
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地址
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