The paper introduces the composition of the operating equipment and their working principles.
介绍了施工设备的组成、工作原理。
Select the separate presentations according to your own interests to learn their working principles and functions.
根据自己的兴趣，选择相应的部分进行单独演示，了解其工作原理和功能。
Combined with 3 typical fuel pump control circuits, this paper introduces their working principles and maintenance methods.
结合3种典型的燃油泵控制电路，分别介绍了燃油泵控制电路的工作原理和检修方法。
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