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电流表和电压表
Ammeters and voltmeters
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电测量仪表用永磁体
Permanent magnet for electrical measuring instrument
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实验室直流电阻器
Laboratory d.c. resistors
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电工仪表用零部件 导电片
Elements for electrical instrumentation -- Conductive chips
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电工仪表用零部件 底脚
Elements for electrical instrumentation -- Base feet
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电工仪表用零部件 调零器
Elements for electrical instrumentation -- Zero adjuster
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电工仪表用零部件 指针
Elements for electrical instrumentation -- Pointer
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电工仪表用零部件 轴尖
Elements for electrical instrumentation -- Pivot
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电工仪表用零部件 线圈架
Elements for electrical instrumentation -- Coil frames
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电工仪表用零部件张丝和吊丝
Elements for electrical instrumentation -- Tautband and suspension
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