Metal work, paint coatings and electrical installations all require regular inspection.
金属加工、涂漆和电气安装都需要定期检查。
For electrical aspects of maintenance, inspection or installation, you must first cut off the power.
对于电气方面的维修，检查或安装，必须首先切断电源。
For electrical aspects of maintenance, inspection or installation, you must first cut off the power.
对于电气方面的维修，检查或安装，必须首先切断电源。
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