直流的

Q: What type of tungsten should I use for AC and DC TIG welding?

问：我应该用什么样的交直流TIG焊钨电极？

Therefore, the study on transient voltage stability of AC/DC power systems is of great importance.

因此，研究交直流系统的暂态电压稳定性具有重要意义。

Micro-force sensor, displacement sensor, micro-DC motor and trephine is integrated. Small size and perfect performance is its key features.

末端执行器集成了微力传感器、位移传感器、微型直流电机和环钻，具有体积小、功能完善的特点。

The paper discusses hardware and software design of the thyristor DC-chopper trolley-bus microcomputer control system.

本文讨论了晶闸管直流斩波器式城市无轨电车微机控制系统的硬件和软件设计。

Based on this mechanism, we have recently developed DC nanogenerator driven by ultrasonic wave in bio-fluid.

利用此工作机制，最近发展了一种生物流体中超声波驱动的直流纳米发电机。

These results indicate that the proposed control scheme can realize good trace performance of input current, is closer to unit power factor, and stabilize the output DC bus voltage.

实验结果表明：采用本文控制方案，系统实现了较好的输入电流跟踪性能，输入功率因数接近1；变流器输出直流母线电压稳定可靠。

World's Largest Unmounted Globe rests in the fountain pool of Explorers Hall, National Geographic Society headquarters, Washington, D. C. Like earth, it rotates on its tilted axis.

世界上最大卸载地球的探险馆，国家地理学会总部，华盛顿，类似地球直流喷泉池在于，它在其倾斜旋转轴。

The device comprises an arc discharge vacuum chamber; wherein, the arc discharge vacuum chamber is connected with a vacuum pump and is internally provided with a graphite cathode and a graphite anode which are connected with a DC supply. The device is characterized in that the graphite cathode and the graphite anode are respectively provided with an upper spherical crown shape graphite plate and a lower spherical crown shape graphite plate which are matched with each other and formed a spherical crown shape capacitor.

它包括电弧放电真空室，电弧放电真空室与真空泵相连接，电弧放电真空室内设有石墨阴极和石墨阳极，石墨阴极和石墨阳极与直流电源相连接，其特征在于在石墨阴极和石墨阳极上分别设相配合的上球冠形石墨板和下球冠形石墨板，上球冠形石墨板和下球冠形石墨板形成球冠型电容器。

The PGA consists of the differential amplifier with variable source degeneration resistor and the DC-offset correction circuit.

该可编程增益放大器采用源极反馈电阻可变的差分放大器结构，且带有直流漂移校正电路。

Through the design detail that vertical plane back to the structure and operation of the wind-tunnel characteristics.

通过本设计，可以详细地了解到低速直流式风洞的结构及运行特点。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。