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经营范围
发明名称
Variable Resistance Device
摘要
申请公布号
GB1189067(A)
申请公布日期
1970.04.22
申请号
GB19680030420
申请日期
1968.06.26
申请人
BECKMAN INSTRUMENTS, INC.
发明人
分类号
H01C10/40
主分类号
H01C10/40
代理机构
代理人
主权项
地址
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