行程

In the upstroke, fluid pressure in the plunger acts on inner surface of expansion sleeve and makes it expand outward, keeping the seal ring press on the inner wall of pump barrel to form good sealing.

上行程时柱塞内部的流体压力作用到胶套内表面上使之向外膨胀，使密封环始终压在泵筒内壁上，形成良好的密封；下行程时弹性伸缩套恢复原状，柱塞和泵筒之间产生间隙。

MWM engine makes the conversion among two-stroke mode, four-stroke mode and six-stroke mode of one engine come true in theory, filles in the blank with 1/3 which is the ratio of total strokes to working strokes in single working cycle of engine, possessing the continuous variable compression ratio of a certain range at the same time, combines the advantages of two-stroke engine and four-stroke engine, expandes the working range of engine greatly.

MWM发动机在理论上实现了一台发动机在二冲程、四冲程与六冲程工作模式之间的相互转换，填补了发动机单工作循环作功行程数与总行程数比值中1/3的空白，同时具备一定范围连续可变的压缩比，整合了二冲程与四冲程发动机的优点，拓展了发动机的工作范围。

Based on optimal design parameters selection and engineering practice, the response time of the high-pressure long-stroke high-speed solenoid was 24.95 ms with a stroke of 4 mm.

结合实际设计要求，采用优化后的结构参数研制的耐高压大行程高速开关电磁铁在4 mm行程时的响应时间为24.95 ms。

Thence she started on foot, basket in hand, to reach the wide upland of heath dividing this district from the low-lying meads of a further valley in which the dairy stood that was the aim and end of her day's pilgrimage.

接着她就提起篮子开始步行，向一片广袤的荒原高地走去。荒原把韦瑟伯利同远处低谷的一片草场分隔开来，而坐落在山谷中的奶牛场才是她当日行程的目的地，也是她当日行程的终点。

Their trip deep into the Blue Mountains in search of the alleged hidden valley UFO base has left many an armchair ufologist exhausted from just reading about the trip.

行程深入蓝山，寻找据称隐藏谷飞碟基地留下了许多的扶手椅ufologist用尽从阅读有关行程。

The test results show rotary driving of 2-DOF actuator reaches 0.45 μrad in resolution, 18 mm in travel, 0.04 rads^(-1) in velocity and 0.2 Nm in torque; linear driving reaches 40 nm in resolution, 20 mm in travel, 19.2 mm min^(-1) in velocity and 10 N in driving power approximately.

试验结果表明：二维驱动器的旋转驱动分辨率达到0.45μrad，行程360°，速度达到0.04rads^(-1)时，扭矩可达0.2Nm；直线驱动分辨率40 nm，行程20 mm，速度19.2 mmmin^(-1)时，驱动力可达近10N，可实现2自由度精密驱动。

The paper introduces the common depressing roll apparatus in pipe manufacture engineering,analyses the motion and the mechanical state,derives the calculation formula of hydraulic piston travel about the distance to control the idler,analyses the parameters on stroke,gives the value range based on practical experience,then determines the range of hydraulic pressure tension.

文章介绍了在管加工工程中常用的升降托辊机构，通过升降托辊机构的运动分析和力学分析，推导出控制托辊升降距离的液压行程的计算公式，分析影响行程设计的各参数的大小，并根据实践经验给出有关参数的取值范围，确定液压拉力的大小。

Based on the relationship between the numerical aperture of the objective lens and scale pitch, this study chooses a suitable Plano-convex lenses available on the market, so as to approximate the diameter of the focusing spots to scale pitch. Also, by using the optical path of an optical encoder similar to the nanoscale, the changes in the surface profile of the scale can be measured directly, so as to obtain the two quadrature sinusoidal signals. By counting the zero crossing of these two quadrature sinusoidal signals and calculating the interpolation value of these two quadrature sinusoidal signals, the moving direction and moving displacement value of the scale can be obtained.

研究中再以搭配物镜的数值孔径与尺条间距的关系，选择ㄧ适当的市售平凸透镜，使聚焦光点的直径与尺条的间距相近，并使用相同於奈米级长行程双雷射聚焦读头装置的光路设计，如此将可藉由直接量测尺条的表面轮廓变化，以获得一组正交弦波讯号，继而利用讯号四分割与细分割处理，计算出尺条之移动方向与移动量，研制出一实用性长行程双雷射聚焦读头光学尺。

The equipment is suitable to test release travel and towing torque, and do experiments for the thickness of clutch driven plate , towing torque and towing travel when it is separated.

本产品主要适用于从动盘总成的自由行程与拖曳力矩试验，可以进行汽车离合器从动盘的厚度、分离拖曳力矩和分离拖曳行程的检测。

The difference is that the relay-like plunger is composed by two separated plungers in different size and reciprocate in corresponding tube in the process of lifting, and the two separated plungers automatically dock with each other when the relay-like plunger is in the process of up stroke and separate in the process of down stroke and constitute the process of the relay plunger lifting.

所不同的是，组合油管接力式柱塞举升系统的卡定器下到下部小油管中，柱塞由大、小两个分体式柱塞组成：小柱塞在下部小油管内运动并实现在小油管中的举升，大柱塞在上部大油管内运动，上行程时小柱塞可与大柱塞自动对接并完成举升的接力，下行程时小柱塞可与大柱塞自动脱离。

Do not gum up the work by telling mother what we are going to do .

别告诉母亲我们要干的事，那会把事情搞糟的。

In recent years, application of the partial prestressed concrete beam s is developed.

近年来，随着部分预应力砼梁应用的推广，发现我国规范所采用的名义拉应力法的计算结果不稳定。