... 直流信号标志 DC signalling code; 直流仪表用变压器 DC meter transformer; 直流应用正交场放大管 DC operated crossed-field amplifier; ...
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I developed a dedicated anti-Meter DC current transformer has been exported to the United States, Italy and other countries.
我公司研制的电表专用抗直流电流互感器已远销美国、意大利等国家。
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