四线的

In this paper, a new one-terminal fault location algorithm for parallel transmission line is introduced.

同杆四回线的研究更是缺少统一的故障分析方法和模型，测距研究也受到限制。

In the crossed plane polariscope, by rotating the polarizer and the analyser at constant rate in synchronism and recording images by a CCD camera continuously, four phase-shifted images whose intensity are integrated by sensors are obtained.

在正交偏振光场下，按一定速度同步旋转起偏镜和分析镜，CCD摄像机可连续获取四幅相移光弹图像，由CCD像敏单元积分获得其光强值，通过所提出的相移法运算，可以迅速地得出全场等倾角和等差线的相位值。

The company has more than 9000 square meters workshop, more than the existing number of 360, production equipment has, industrial sewing machines 157 sets up high-speed sewing machine 40, high-speed triangle zigzag sewing machine 40, a four-lane machine, multi-needle quilter, as well as other related types of machines.

公司有9000多平方的标准厂房，现有人数360余名，生产设备有，工业缝纫机157台，高速绑缝机40台，高速三角锁边机40台，四线机、多针绗缝机，以及其他相关配套的各类机器。

He armature winding of TFW2 series generators is connection in star with neutral-point, three phase four wire system.

FW2系列发电机的电枢绕组为带有中性点的星形接法，三相四线制。

The generators are three-phase,four-wire type, adopting star connection with neutral point. The rated line voltage is 400V,phase voltage 230V,frequency 50Hz,power factor 0.8. We can provide 60Hz and the other voltage's generator according to the customer's request.

发电机为三相四线制，采用带有中性的星形接法，额定电压为400V，相电压为230V，频率为50HZ，功率因素0.8，根据客户要求，我们也可提供60HZ及其电压的发电机。

The generators are of three-phase four-wire type,making use of star connection with neutral point.The rated line voltage is 400V.phase voltage 230V.frequency 50Hz,power factor 0.8.It can provide 60Hz and the other voltage's generator according to necessary.

本发电机为三相四线制，采用带有中性点的星接法，额定电压为400伏，相电压为230伏，频率50赫，功率因素0.8根据用户需要，也可提供60赫及其它电压值的发电机。

Criteria and measurement system built for quantum wires on nonplanar substrates.

四、建立了判别非平面衬底上的量子线的判据及测试系统。

The interference of metal ions Fe(superscript 3+、Cu(superscript 2+)and so on in oil can be eliminated by using hydroxyl amino hydrochloric acid and sulfourea as masking agents.

以盐酸羟胺和硫脲作为掩蔽剂可消除Fe(上标 3+)、Cu(上标 2+)等离子的干扰，对大庆原油与锦西减四线馏分油中的钒进行测定，相对标准偏差不大于3.5%，加标回收率为

This paper presents a new reactive power compens ator to reduce the negative and zero sequence components of load currents and to improve the load bus power factor of unbalanced three-phase three-wire and three-phase four-wire distribution feeders.

提出了一种用于补偿不对称负荷产生的负序、零序分量并调整负荷母线电压，且适用于三相三线制和三相四线制系统的新型无功补偿器。

Design of software and hardware, technical characteristics and failsafe of the performance units are discussed in detail with the four-line switches module as an example.

以四线制道岔电子模块为例，对执行单元的软硬件设计、技术特点以及故障安全实现方法等方面进行了详细的论述。

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。