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发明名称
Cord extension device
摘要
申请公布号
US2503018(A)
申请公布日期
1950.04.04
申请号
US19460688889
申请日期
1946.08.07
申请人
WITTMAN RICHARD C
发明人
WITTMAN RICHARD C.
分类号
B65H75/36;H02G11/00
主分类号
B65H75/36
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