查询词典 direct current

It is possible to convert alternating current to direct current.

把交流电转化成直流电是可能的。

In alternating current the motion of the charges is periodically reversed; in direct current it is not.

在交流电中，电荷流动会定时的反向，而在直流电中则不会。

The resistance of a conductor is not constant for alternating current as it is for direct current.

导体的电阻对于交流电来说并不像它对于直流电那样是恒定的。

An electronic device which converts alternating current to direct current.

一种将交流电转换成直流电的电子设备。

A device used to convert direct current into alternating current .

它表达了流动资产与流动负债之间的关系。

Products and Service: DN series data-controlled alternating current projectiong welder ZDN data-controlled commutate spot welder UN data-controlled commutate spot welder DKR\DR capacitance energy storing spot welder FN alternationg and ZFNcommutate sewing welder DM direct current pulse spot welder seam welding machine of protectiong by gas for recti or cirol seam varity of special seam welding machine for poine stich AND DKR-350 capacitance energy storing spot welder has been certified whit national patent and DTN-100/DTN-150 has been honored with technology innovation award.

现主要产品有： DN系列数控交流式点凸焊机。 ZD数控次级整流式点焊机。 UN数控交流对焊机。 DKR、DR电容贮能式点焊机。 FN交流式和ZFN次级整流式缝焊机。 DM直流脉冲式电焊机。直、环缝气体保护焊接专机。各类焊接生产线。其中： DKR-350电容贮能式点焊机获国家专利。

When the cables use in alternating current system, rated voltage of cables should be at least equal the rated voltage of the system; When the cables use in direct current system,rated voltage should be not greater than 1.5 times of the rated voltage of the cables .

当电缆使用于交流系统时，电缆的额定电压至少应等于该系统的额定电压；当电缆使用地直流系统时，该系统的额定电压应不大于电缆额定电压的1.5倍。

We observe gate current by biasing the gate at fixed voltage and gate direct tunneling current will show two or three levels. The cause is carriers trapping in the trap site during tunneling through gate dielectrics and detrapping by thermal emission.

透过给一固定的闸极电压观察闸极电流，闸极直接穿隧电流会在多个层次间振动，其原因来自於电荷在穿越闸极层时，会掉进闸极层里面的缺陷并被抓住，但又容易藉著热从缺陷中散逸。

In order to solve the application problem of conduction heating machining, this project investigates some problems, such as dynamic characteristics of heating power, features of circuit current and voltage, arc discharge states and so on. It also studies control characteristics of Uni-phase or Tri-phase Direct Current Power Supply and Inverse Switch Power Supply. A High Frequency Inverse Switch Commutate Power Supply is developed.

为了解决导电加热切削的应用问题，从加热电源的动态性能和回路的电流、电压特性及电弧放电状态等方面进行研究，分析比较了单、三相交直流电源和逆变开关电源的特点和控制特性，研制了高频逆变开关整流电源。

Charger is the use of power electronic semiconductor devices, constant voltage and frequency of the alternating current to direct current conversion of a static inverter device.

充电器是采用电力电子半导体器件，将电压和频率固定不变的交流电变换为直流电的一种静止变流装置。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。