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发明名称
VARIABLE RESISTANCE DEVICE
摘要
申请公布号
CA827307(A)
申请公布日期
1969.11.11
申请号
CAD827307
申请日期
申请人
BECKMAN INSTRUMENTS
发明人
LESLIE T. PEART;CHARLES W. YUNGBLUT
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主分类号
代理机构
代理人
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