牵引作用

The gas was slowed by a drag force similar to air resistance.

由于类似空气阻力的牵引作用，这些气体的速度减缓。

Microprocessor-based feeder line protection equipment is regarded as one of the important components of traction power substation automation, which is fundamental to guarantee the safe and stable operation of the electric railway.

摘要牵引变电站自动化系统是保证电气化铁路安全稳定运行的基础，而微机馈线保护装置作为牵引变电站自动化系统的重要组成部分之一，具有极其重要的作用。

In the study, the authors considered the formation mechanism of the "y"- type structure as follows : the EW - trending compression stress field was derived from the sinistral strike - slip of Wufengxian - Tiesitang fault in Indosinian orogeny and the traction of the sinistral strike - slip made the NNE -trending structural lineament produce sinistral torsion in the west part of the Anren county seat, thus the NNW - trending folds were resulted.

研究认为，"y"字型构造形成机制为：五峰仙-铁丝塘断裂在印支运动中具基底左旋走滑性质，走滑所派生的近东西向挤压应力场，及走滑所产生的牵引作用，使安仁以西NNE向构造线产生逆时针旋转，从而形成NNW向褶皱。

The increases in the cell density in the sutures of the treated groups were higher as compared to the two controlled groups for 3 7 14days indicating that cellular hyperplasia in the expanded sutures were accelerated by the protraction .The cell density in the palatomaxillary sutures and in the frontomaxillary sutures differed in increase ways at the two time points of 21th day and 28th day suggested that the mode of bone formation in the circummaxillary sutures is different from one another..5 The expression of Proliferating Cell Nuclear Antigen were always higher than the controls in the course of this study,which i

而在21、28天时间点两个骨缝与对照组相比在相同时间点增长程度明显不相一致，提示我们不同的上领骨周围骨缝在前牵引作用下改建方式过程可能不一。5、在上领前牵引作用下，上领骨的额领缝内的PCNA的阳性表达一直高于对照组，提示前牵引促进上领骨周围骨缝内细胞增殖活动增强。

The engine main circuit have to be gurranteed drawing the torque of electric motor and rotation speed wholly to do regulateing of independence ,But also possess extensive setting range SS7's mould electric locomotive adopts Quan Kongqiao and semi bridge accuseeing series connection to make up the monophase bridge style commutation electric circuit ,The coil power supply is encouraged against the stringtrain by the electric motor the drawing armature to 3 parallels operation ,Still there is an excitation commutation bridge ,He encourages the coil power supply with 3 electric motors drawing together to the series connection ,Moreover has one another accuses the regulating action .

机车主电路必须保证牵引电动机的转矩和转速都可作独立的调节，而且要有宽广的调节范围。SS7型电力机车采用一个全控桥和一个半控桥串联组成单相桥式整流电路，向3台并联工作的牵引电动机电枢与串励绕组供电，还有一个励磁整流桥，向串联在一起的3台牵引电动机他励绕组供电，并具有相控调节作用。可以实现机车无级调速和无级削磁。SS7型电力机车采用再生制动方式，再生制动时，牵引电动机作直流发电机工作，并且将电能馈送回接触网，此时电力机车相当于一个移动的发电站。

For the first time, a screw pile and pile driver system for preventing flood and rushing to deal with an emergency was manufactured. The screw piles of the system is different from screw drills used to sap, and it doesn't push soils out. Analyses, including the screw pile's structural strength analysis and the screw blade's welding analysis, were done by ANSYS, which showed that the screw pile's structural strength is enough and that the distort of the screw blade is small. Testing on the screw pile and pile driver system showed that the system performed stably and could meet the need of preventing flood and rushing to deal with an emergency. A mechanics model of interaction of a screw pile and soil was built, and expressions of torque of screw pile's cylindrical part on the condition of screw pile's crew part being driven into soil fully were gained, then the relation of the torque with screw pitch and out diameter of cylinder, which shows the torque decreases with the screw pitch increasing, and that the torque increases with the out diameter of cylinder increasing, which was according with the experiments of the screw pile's being driven into soils, and thus a screw pile with the best structure was chosen. Experiments of bionic surface showed that, on the condition of certain pressure on the surface, the protruding bionic surface can not reduce adhesion and resistance and that the corrugated bionic surface can reduce adhesion and resistance. An orthogonal experiment of the corrugated bionic surface was done with the factors including the width of protrusion, the space between two protrusions, the trolley's velocity and the vertical surface pressure and with the surface frictional coefficient as the experimental target, and some inclusions were drawn that the best combination of the factors was acquired and that the width of protrusion affected the surface frictional coefficient remarkably.

研制了防汛抢险螺旋桩机系统，提高了沉桩作业效率；利用ANSYS对桩体进行整体结构强度分析以及螺旋叶片的焊接分析，表明桩体结构强度足够，焊接过程中，螺旋叶片的变形小；对整个螺旋桩机系统进行试验，表明该系统性能可靠，工作稳定，作业效率高，能够满足防汛抢险沉桩作业基本需要；建立了螺旋桩桩土作用力学模型，得出螺旋桩沉桩过程中螺旋桩螺旋部分完全进入土体时螺旋桩圆柱部分所受扭矩以及扭矩与防汛抢险螺旋桩的螺旋导程和圆柱外径的关系曲线，表明螺旋桩螺旋部分完全进入土体时螺旋桩圆柱部分所受扭矩随着螺旋导程的增大而减小，随着圆柱外径的增大而增大，这与螺旋桩沉桩试验结论相符合，据此优选出最佳结构的螺旋桩；仿生曲面试验表明，尺寸较小的球冠突起型仿生曲面在一定压力作用下未能起到减粘降阻的作用，而尺寸较大的波纹型仿生曲面相对平板具有一定的减粘降阻作用；以波纹型仿生曲面突起宽度、波纹型仿生曲面两突起之间间距、台车的牵引速度以及叶片表面垂直载荷为因素，以曲面摩擦系数试验指标进行正交试验，寻求出在一定试验条件下最佳因素水平组合；波纹型仿生曲面突起宽度在本试验条件下对曲面摩擦系数影响显著，而其它几个因素对曲面摩擦系数影响均不显著；通过波纹型仿生曲面突起宽度和台车牵引速度的单因素试验，表明曲面摩擦系数随着仿生曲面突起宽度的增大而减小，而随着台车牵引速度的变化基本保持不变，和正交试验结果保持一致。

An automobile tire with deep tread to give traction in snow.

带有深轮胎面在雪中进行牵引作用的汽车轮胎。

Head back to use the self continue to play a small role in the weight of traction, the 26 Pillow taste of Chinese herbal medicine, directly on the neck and improve local blood circulation, ease muscle cramps, relieve the sense of

利用头部后仰的自重起到持续小重量的牵引作用，枕芯的26味中草药，直接作用于颈部，改善局部血液循环，缓解肌肉痉挛，减轻感

According to the characteristics of cervical disease and cervical human natural physiological curvature, Head back to use the self continue to play a small role in the weight of traction, the 26 Pillow taste of Chinese herbal medicine, directly on the neck and improve local blood circulation, ease muscle cramps, relieve the sense of Feel oppressed nerve endings to reduce the local tissue tension, anti-inflammatory, analgesic, sedative, to ease rapidly brought about by a variety of cervical spondylosis discomfort, treatment and prevention is ideal for cervical spondylosis.

根据颈椎病的发病特点及人体颈椎自然生理曲度，利用头部后仰的自重起到持续小重量的牵引作用，枕芯的26味中草药，直接作用于颈部，改善局部血液循环，缓解肌肉痉挛，减轻感觉神经末梢压迫，减少局部组织张力，消炎、镇痛、安神，迅速缓解颈椎病带来的各种不适，是治疗和预防颈椎病的理想产品。

Therefore the feeding speed can be controlled and maximal pushing force can be restricted by regulating the pressure of the hydraulic cylinder. The flexible jet pipe advances along the jetted hole with the tractive effort of the nozzle.

喷管在喷孔内主要处于承受轴向张力状态，喷嘴对喷管的牵引作用是柔性喷管能顺着喷孔送进到较大深度的主要原因。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。