基本解釋[動力與電氣工程]二次額定電壓額定二次電壓詞組短語短語Secondary rated voltage and current 次級額定電壓及電流Primary and secondary rated voltage 初次級額定電壓rated secondary voltage更多詞組專業(yè)釋義動力與電氣工程二次額定電壓額定二次電壓