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