GB/T 7676.5-2017直接作用模拟指示电测量仪表及其附件第5部分:相位表、功率因数表和同步指示器的特殊要求国家标准
英文:Direct acting indicating analogue electrical measuring instruments and their accessories—Part 5:Special requirements ...
英文:Direct acting indicating analogue electrical measuring instruments and their accessories—Part 5:Special requirements ...