本文提出了由一条二次曲线和与该二次曲线不共面的两条异面直线为导线，与该三导线均相交的直线轨迹是一个直纹四次曲面，并讨论了二次曲线分别为椭圆、双曲线和抛物线时，形成的曲面的形状特征。
In this paper, it is presented that the locus of a line crossedwith each of two guide lines and a guide conic not being on a commonplane is a ruled surface of fourth order.
本文提出了由一条二次曲线和与该二次曲线不共面的两条异面直线为导线，与该三导线均相交的直线轨迹是一个直纹四次曲面，并讨论了二次曲线分别为椭圆、双曲线和抛物线时，形成的曲面的形状特征。
It is presented that the locus of a line crossed with each of two guide line and a guide conic not being on a common plane is a ruled surface of fourth order.
这一款耳塞导线上有回放控制和像个农贸市场般齐全的耳塞头：三椎体的，黄色泡沫圆柱体，以及五种尺寸的黑色硅胶。
They include playback controls on the cord and a whole farmer’s market of tips: triple-cone, yellow foam cylinders, and five sizes of black silicone.
这款耳机配有一根五彩纺线的导线，耳线上有回放和音量控制，三种尺寸的耳机头，甚至还配有一个与iPhone或iPod接口的麦克风。
They come with a cool, colorful and fabric-covered cord, playback/volume controls right on the cable, three sizes of tips and even a microphone for use with the iPhone or iPod Touch.
进行各种电阻温度测量时，建议使用三根导线的热电阻探测器电缆。这样就可降低环境温度对电缆的影响。
With all the resistance-temperature measurements, the use of three conductor RTD cable is recommended. The effect of ambient temperature variations on the cable is thereby minimized.
还有第三根导线，即读出线。
RS- 485的三态能力允许以半双工通讯的方式分享传送和接收信号的一对导线。
The tristate capabilities of RS-485 allow a single pair of wires to share transmit and receive signals for half-duplex communications.
患者均进行了三腔双心室同步起搏，起搏电极导线分别置于右心房、右心室以及经由冠状静脉窦置于一支心脏静脉起搏左心室。
All of them received three chamber biventricular pacing and the left ventricular pacing lead was inserted into a cardiac vein through coronary sinus.
不过，至少有一个设施使用一个浮动的三角洲中学没有接地导线的话。
However, at least one facility used a floating delta secondary with no grounding conductor whatsoever.
线圈有三孔插头，其中上为接地线，左右孔接工作导线。
Coil with three-hole plug, which on the ground, then work around hole lead.
运用三联脚架法减弱仪器对中误差和目标偏心误差，从而提高导线测角和测距精度。
Using trigeminy tripod method weakens instrument center deviation and target partiality error, thereby improve wire goniometry and ranging accuracy.
基于三种细导线目标数值计算散射场的仿真实验表明，相比于传统E脉冲能量识别数，本文方法取得了很好的识别效果。
Simulations using numerically calculated scattering response based on three thin wire target demonstrate that the method proposed in this paper is surprier to the traditional E-pulse.
第三个例子是导线的电阻，它也随冷热的变化而变化。
A third example is the electrical resistance of a wire, which also varies with hotness and coldness.
三相输电线路导线表面电荷的分布是不均匀的，各点电场强度的大小也不同。
The distribution of surface charges in three-phase transmission lines is uneven and the electric fields of various points are different.
针对全站仪三维导线的作业方法，讨论了它的精度匹配问题，得出等级平面导线与对应的等级高程导线相匹配的结论。
Aimed at surveying method of three-dimensional traverse, this paper makes research on accuracy matching of three-dimensional traverse by Electrofiic total station.
根据条件平差原理，推导出三维导线平差的数学模型，并在VB下实现平差程序设计。
On the base of the principle for conditional adjustment, a mathematic model of3-D traverse adjustment is given, and a program of adjustment is designed in VB language.
结果：三种普通电极导线都能成功地送入心脏静脉。
Results: All of ventricular leads were successful placed in the cardiac veins.
受磁场对载流导线有力的作用和牛顿第三定律的启发，希望制造一种新型的直流电动机。然而失败了。
Inspired by the force action caused by magnetic field to current carrying conductor and Newton's third law, we tried to make a new type of DC motor, yet we failed.
在导线第三次断开时，病人年龄14岁，体重69磅（31.3公斤），决定给予服用异丙肾上腺素制剂作进一步试验，以期望免去这男孩一次经受 胸廓 切开术。
When the wire Broke for the third time he was 14 years old and weighed 69 lbs (31.3kg). It was decided to give Saventrine a further trial in the hope of sparing the Boy yet another thoracotomy.
因此必须提出一种适合于全站仪导线的平差方法，使观测到的导线点的三维坐标能直接参与平差计算。
Must propose a suitable method of adjustment wires total station, so that the observed three-dimensional coordinates of traverse points can be directly involved in the adjustment calculation.
所以线路换位的目的是要使每相导线感应阻抗和每相的电容相等，以减少三相线路参数的不平衡。
It analyzed the unbalance of both single-circuit line and double-circuit lines in same tower, made a summary of their transposition methods.
本文并介绍了工程上的两个应用实例：（1）三相封闭母线外壳涡流。（2）大功率三相电炉引入导线的电流分布。
Two practical applications are described: (1) eddy currents in 3-phase bus enclosures; (2) current distribution among the lead…
最后将字符、导线和元器件符号三元素有机结合，得到输出结果。
After all 3 kinds of elements being recognized, they are well organized to form the final result.
得出三维涡流场的场分布图和涡流损耗随导线偏移量的变化曲线。
Finally distribution of 3-d eddy-current field and variation curve of eddy current loss to the variation of wire position can be get.
得出三维涡流场的场分布图和涡流损耗随导线偏移量的变化曲线。
Finally distribution of 3-d eddy-current field and variation curve of eddy current loss to the variation of wire position can be get.
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