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发明名称
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摘要
申请公布号
US2977428(A)
申请公布日期
1961.03.28
申请号
US19600005568
申请日期
1960.01.29
申请人
SHOWALTER ALBERT E
发明人
SHOWALTER ALBERT E.
分类号
H01H9/16;H01H13/74;H03J5/32
主分类号
H01H9/16
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