介绍气动标记机控制系统的组成及原理，并分析介绍了常见故障的处理方法。
The paper introduces the composition and the principle for the control process of the pneumatic marker control system.
介绍气动标记机控制系统的组成及原理，并分析介绍了常见故障的处理方法。
The paper introduces the composition and the principle for the control process of the pneumatic marker control system. It also give detailed analyses to the normal troubleshoot.
介绍了焦化塔底阀的结构特点，论述了焦化塔底阀使用过程中常见故障的处理方法。
Introducing the structural features of the bottom unheading valve and describing the troubleshooting method of the bottom unheading valve on the common troubles.
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