numerical frequency selection
numerical frequency selection
数值频率选择
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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This text is chiefly directed against the selection of variable frequency motor and inverter in the lathe numerical control rebuilding, and the lectotype of converter is analyzed.
本文主要针对车床数控化改造中变频电动机的选择、频器的选型进行分析。
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