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.

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。

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Blackbeard, who narrates the new AC4 trailer, has been the subject of many movies and documentaries.

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But I can say that at first blush, it seems AC4 looks like a decent enough seafaring game, with more than enough buckles to swash.

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From the cover art in AC4 that, and its title we can expect even more adventure on the high seas than Connor had in AC3 in his warship, Aquila.

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