时轴

The purpose of the check valve is to prevent impurities from penetrating the rock drill when pressedair is shut off.

卡环控制钻头的轴向运动，而逆止阀是当停止供应压气时，用来妨止岩碴等杂物进入冲击器。

Tom:Two years ago I broke my arm when I was roller skating on the street.

两年前我在街上玩滚轴溜冰时摔断了手臂

My dad gave me the rollerblade as a gift when I was ten years birthday.

我十岁生日时爸爸送了我那双直排轮滚轴溜冰鞋作为礼物。

This article researches affection of atmosphere pressure to hydro-kinetic force process by using fluid mechanics theory and works out amendatory method about pump allowable mounting height, wind pressure of centrifugal fan,rotor power and gas rotameter scale and algorithm of air-pressure pipe length of counter-current flow hight-order condenser in different atmosphere.

本文应用流体力学原理，研究了大气压对流体动力过程的影响，得出不同大气压时，泵的允许安装高度，离心式风机风压，轴功率，气体转子流量计刻度的校正方法和逆流高位冷凝器气压管长度的计算方法，对不同海拔高度地区，特别是高原和盆地地区具有十分重要的现实意义。

This peak arises from the preferential rotation of the axes of carbon pairs existed in the specimen under the influence of an alternating load.

在外加应力的作用下，这类碳原子对轴的择尤旋转便引起了内耗。根据这个机构并结合内耗测量过程中试样内部碳原子重新分布的情况，可以推导出碳浓度和内耗峰高度之间的定量关系，并从而求出合金的点阵空位形成能和构成碳原子对时所放出的能量。

The shaftless rotogravure machine has been becoming the most remarkable new development in printing technology during last 10 years.

电子轴传动凹印机是凹印领域在过去近10年时内最引人注目的技术进展之一。

It has high friction properties, resemble anti-wear properties and brake moment curve compared with Dunlop company and Messier-Bugatti company carbon brake discs materials. It has excellent mechanics performance and axis heat conduct coefficients compared with abroad carbon brake discs materials. The friction properties of RTO Wetness normal brake increased by 23％-29% than Dunlop carbon brake discs materials.

与英国Dunlop公司、法国Messier-Bugatti公司生产的炭刹车盘材料相比，其高摩擦特性及抗磨损性能相当，刹车力矩曲线形态相似，且力学性能、轴向导热系数明显高于国外炭刹车盘材料，RTO刹车湿态刹车时的摩擦特性高出Dunlop炭刹车盘材料23％-29%。

Firstly,using the method of concentrate mass this paper establish a non-linear dynamics model of a two-stage gear train with backlashe between the gear pair,and through analysed the dynamics model,the torsional motion differential equations are got , on this basis,then calculate the torsional motion differential equations using Runge—Kutta method ,and discuss how to influence the dynamics characteristic of system when these parameters chage such as mesh frequentcies、 stiffness of the intermediate shaft、the ration of mesh frequentcies.and discuss when the chaos will happen under the change of these parameters.

首先用集中质量法建立系统的含间隙的非线性动力学模型，并根据牛顿力学定理，得到系统的运动微分方程。然后对所建立的运动微分方程运用四阶变步长Runge—Kutta方法进行了求解，并对计算结果进行分析，研究了齿轮啮合频率、中间联接轴的刚度，一、二级齿轮的啮合频率比等参数变化时，对系统非线性动力学特性的影响规律，并讨论了当参数如何变化时会导致系统的混沌响应的出现。

This paper first analyzes the NC-ASM work principle and the movement control request, uses the integration of machinery system design methods, designed its overall modelling, the mechanism and the control system, chose the structure suited the scriber mechanism, designed examination and prevent collision structure, carried on the thorough comparison and the analysis in this foundation to the scriber movement control realization key technologies, has chosen the most appropriate plan and has given the detailed explanation, has formed the design proposal.

以可编程控制器为控制核心，集中完成三轴联动控制信号和触摸屏串口通信信号的收发，在进行系统与外围设备配置时留有余地，以便进行二次开发。

Warrior, when she was launched in 1860, even had hot baths for the off-duty stokers to scrub down, and a ship's laundry, with hand-turned washing machines, and drying areas by the hot funnel shafts.......

勇士号，当她在1860年下水时，甚至配有给下班司炉工擦洗煤灰的热澡盆，还有一个船上洗衣间，配有手动洗衣机，和在热烟囱轴弄附近的干衣间。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷