继电器的接触点就可以执行控制功能。
The contacts of this relay can be used for control functions.
详细分析了交流接触器在不同使用条件下的闭合与分断时触点两端电压与回路电流情况，并研究了AC1～AC4工作制下的控制时序。
The conditions of voltage between contactors and current in main circuit under different using types are analyzed in detail, then designed the control sequences with working mode AC1-AC4.
三是分析在三方关键接触点上商家的具体传播策略及其控制特征。
Third, it discusses the specific communication strategies on the business and its control characteristics around three key points of contact.
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