once through tubular boiler

Discussion on advantages of MF inverter DC resistance welding;

中频逆变直流电阻焊优势探讨

The design and application of the KYZ-250/550 type dc impulse speeder of stringing locomotive;

KYZ—250/550型直流架线电机车脉冲调速器的设计与应用

DC energy conservation control transform of hoist AC contactor;

提升机交流接触器直流节能控制改造

Aiming at the direct current(DC) power source system of the electric power system,introduces systematically the diagnosis technology of the direct current ground fault,analyzes several diagnosing methods of the direct current ground faults.

针对电力系统的直流电源系统直流接地故障的诊断技术进行介绍,对几种直流接地故障诊断方法进行了较为详细的分析。

Response of direct current circle in a cased borehole and its application research;

套管井中直流环的响应及其应用研究

The Differences and Similarities between Alternating Current Contact or and Direct Current Contactor and the Replacement of Each Other;

交流接触器与直流接触器的异同及代换使用

Briefly narrating the direct current system configuring and features of the middle and small sized hydropower station;

简述中小型水电站直流系统的配置及特点