介绍了直流机组常用的水化学工况，并着重分析了直流机组联合调节水处理法的主要优点。
Water chemistry condition in common use is introduced and main advantages of integrated regulation water treatment method on once-through unit are analyzed emphatically in this paper.
分析了导致不带平衡电抗器的整流机组直流负载拐点电流超出许可范围的成因；
The cause that transition current of DC-load in rectifier unit without balance reactor exceeds the range of permission is discussed.
直流传动控制模块在焊管机组拖动中，具有提高效率和准确度以及降低差错率等作用，介绍了使用该控制模块的有关问题。
DC drive control module can function as increasing efficiency and accuracy and reducing error rates in tube-welding drive system. Details of the module are described.
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