4.3 各种电气设备的选择和校验的翻译：4.3 selection of all kinds of electrical equipment and calibration 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

4.3 selection and calibration of various electrical equipment

4.3 selection of all kinds of electrical equipment and calibration

4.3 each kind of electrical equipment choice and verification

Select the 4.2 electrical equipment environmental conditions

4.3 selection of all kinds of electrical equipment and calibration