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电工仪表用零部件 平衡锤
Elements for electrical instrumentation -- Balance weight
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电工仪表用零部件 游丝支片
Elements for electrical instrumentation Chips supporting spiral spring
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氧化锌避雷器阻性电流测试仪通用技术条件
General technical conditions of resistive current tester for zinc oxide surge arrester
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变压比测试仪通用技术条件
General technical specifications of the transformation ratio tester
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高压介质损耗测试仪通用技术条件
General technical specifications of the high voltage dieletric loss detector
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直接作用模拟指示电测仪表及其附件用字型和符号
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