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当前,我国与世界各国或地区的贸易交往日益频繁。为扩大机床出口,了解各国各地区供电电源的频率和电压是很有必要的。现将收集到的一些情况介绍如下,供参考。
At present, trade exchanges between China and other countries or regions in the world are increasingly frequent. In order to expand the export of machine tools, it is necessary to understand the frequency and voltage of power supply in various regions of each country. Some of the information that will be collected is presented below for reference.