往复运动

In contrast, typical valve actuation speeds and cycle rates are 15 milliseconds and 400 cycles.

而与之相比，典型的阀动作时间和往复运动频率分别为15毫秒和400次。

All of the aerodynamic force must be produced in the absence of any incident flow, meaning lift can only be produced by the powered reciprocating motion of the wing.

所有的空气动力都必须在缺乏任何迎流的情况下产生，意味着只可能通过翼的有动力作用的往复运动来产生提升。

Unsteady flow of power-law fluid in eccentric annuli with the inner cyinder reciprocating axially is studied in this paper.

本文研究了幂律流体在内管做轴向往复运动的偏心环空中非定常流的流动规律。

In the process of feeding and high-speed separation, under the centrifugal force, the liquid phase is discharged out of the basket through the filter cloth and the holes of the basket wall, and then out of the machine through the tube for discharging liquid, with the solid phase left in the basket.

进料和高速分离过程中，在离心力作用下，液相物穿过滤布和转鼓壁滤孔排出转鼓，经排液管排出机外，固相物截留在转鼓内，分离完毕转速至卸料转速状态，人工使刮刀作升降、回转往复运动，将固相物从转鼓壁刮下，从离心机下部排出。

The wellhead part mainly includes the controlling device, the pneumatic valve, the blowout control box, the damping spring and the plunger catcher, and the downhole part consist of the combination tubing, the buffer spring, the tubing spider and the plunger which reciprocated between the tubing.

井口部分主要包括控制器、气动阀、防喷盒、减震弹簧、柱塞捕捉器；井下部分主要包括大小油管、缓冲弹簧、油管卡定器，以及在大小油管间往复运动的柱塞。

An inside conical surface at the lower end of the joint is designed to ensure the shaft swing freely within an angle range of 10°, thereby the axial bending stress caused by the deflection of the borehole can be eliminated effectively.

这种装置采用类似球形关节的旋转机构，消除了抽油杆柱上下往复运动产生的倒扣扭矩；在短节下端设计有10°的内圆锥表面，使转轴能够在10°范围内自由转动，从而有效地消除了由于井身弯曲而产生的轴向弯曲应力。

In l960 an American psychiatrist named William Dement published experiments dealing with the recording of eye- movements during sleep.

1960年美国精神病学家WilliamDement发表了人在睡眠吋眼球活动的实验记录。活塞快速的往复运动。

In full machine cutting mode, the main motor drives the flywheel, which drives the saw frame back and forth along a straight line, the work piece on the block trolley sustains top-rising cutting by elevating the lift platform.

整机切割方式，主电机驱动飞轮，带动锯框做直线往复运动；装载荒料的荒料车通过升降台的提升实现荒料顶升式锯切。

The uniform reciprocating motion is developed based on the character of uniform transmission ratio of gear transmission.

由于这两种机构产生的往复运动的速度是变化的，影响了机床的加工质量。

It cannot allow the link to translate on the horizontal direction, thus enabling the link to do reciprocating motion.

不能让杆子的中心点左右移动，才能做往复运动。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。