机组

This paper also discusses the issues we might meet and their resolutions. These problems include self-excitation of units, overvoltage, voltage-control, system stablitity, and this paper provides some ways to resolve these issues.

论文讨论了黑启动过程中可能出现的机组自励磁问题、操作过电压问题、电压控制问题、系统稳定问题，并针对这些问题提出了解决的对策。

Based on generator self excitation theory and the characteristics of black-start, we choose this simple method to be the criterion of generator self excitation problem in black start. Later, simulation of hydraulic generator self-excitation study is given.

从适用於黑启动快速这一特点出发，在已有的方法中选择了一种简单的近似方法来作为黑启动研究中自励磁产生与否的判据，从自励磁现象本质出发进行了阐述，并对水轮机组自励磁产生的暂态过程进行了仿真计算。

These errors together with the self-induced vibrations and forced vibrations affect the measuring results, and cause dynamic errors.

指出这些误差和测量机组成部件的自激振动、受迫振动等将对测量结果产生影响，引起动态误差。

The sequential control of the machine groupmainframe can realize not only by programmable controllerbutalso by total distributed control system .

机组主机的顺序控制可由可编程序控制器实现，也可由集散控制系统实现。

The sequential control of the machine group mainframe can realize not only by programmable controllerbut also by total distributed control system .

机组主机的顺序控制可由可编程序控制器实现，也可由集散控制系统实现。

The main products are: Fan series, muffler series, valve-type series, aluminum alloy tuyere series, ventilation pipe series, cooling tower series, FRP winding series, water purification equipment, plumbing equipment, water tanks series, central air conditioner series, central air-conditioning fittings series, central air-conditioning unit series, the central air-conditioning fan coil series, power equipment, air-defense equipment and other products.

主要产品有：风机系列、消声器系列、阀类系列、铝合金风口系列、通风管道系列、冷却塔系列、玻璃钢缠绕系列、净水设备系列、水暖设备系列、水箱系列、中央空调器系列、中央空调配件系列、中央空调机组系列、中央空调风机盘管系列、电力设备系列、人防设备系列等系列产品。

QingXia QX47B-2-NP sexto two-color coding machine is based on the above-mentioned two-color offset press plus NP coding functional unit. The NP part adopts 6 print inking rollers, of which 2 are close to the plate so the special needs of the users can be met.

青霞QX47B-2-NP型六开双色打码机是基于上述双色机再加上NP打码功能机组，NP部分采用6根墨辊，其中2根靠版，可满足用户的特殊需要。

Piasecki estimates a production SpeedHawk - with its VTDP, wing and 650 shaft horsepower supplementary power unit - would weigh 1,750 pounds more empty than a UH-60L, but have a 500-pound greater useful load and almost three-times the combat radius.

皮亚塞茨基估计生产SpeedHawk -其V TDP，机翼和6 50轴马力的补充机组-将重量更一七五○英镑空比的U H -6 0 L，但有一个50 0磅的更多有用的负荷和近3倍，作战半径。

With the opening of a facility in late September, Vestas now has three factories, all in the coastal city of Tianjin, producing generators, nacelles （the hollow shells which house the drive shaft and gearbox）, and hubs for 1.8- and 2-megawatt wind turbines.

随着9月末一家新工厂的开工，威斯塔斯在中国已经有三家工厂，全部位于沿海城市天津。这些工厂主要生产发电机、发电箱（主要容纳传动轴和变速箱）以及1.8与2兆瓦风力发电涡轮机组。

The guide bearing lubrication performance of hydropower sets is directly relative to the problems of shafting abrasion and vibration.

水轮机导轴承的润滑性能直接关系着整个机组轴系的磨损与振动问题。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。