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A rigid-plastic FEM program for the analysis of working piece deformation in single pass hot bar rolling was developed. Combining with the analytical model, the strain and strain rate of hot rolled bearing steel GCr15 bar during roughing and intermediate rolling processes was calculated and compared with the real values.

应用刚塑性有限元法开发了轧制过程单道次变形分析的通用程序，与解析法结合对实际热连轧生产GCr15棒材的粗轧和中轧过程中的应变－应变速率进行了计算值与实际应变的对比。

Falling hard matters on Kelly guide slewing bearing of erecting Kelly bar will cause strapped bar or rod blocking.

塞物带杆，①钻杆与主卷扬连接的提引器安装用钢丝绳卡要选用合格产品，钢丝绳卡断裂碎块会落入钻杆间隙将管卡死，造成带杆、卡杆。

Danyang xinxing textile equipment accessory factory is specialized in producing all kinds of airflow spindle,rotating cup,separating bar,pressing wheel,movable passageway,resisting twister,shock absorber and so on.we are capable of cooperating in research and development of new products.at present we act as agent in importing altax,lida,rotating cup,separating bar,german needle cloth,jinjing needle cloth,glaf needle cloth and bearing.

丹阳市新兴纺机专件厂是专业生产各种型号的气流纺、转杯、分梳辊、压轮、活络通道、阻捻头、减震套及各种小配件并合作研制、开发的专业化工厂。工厂并代理进口艾立泰克斯、立达、转杯、分梳辊、德国针布、金井针布及格拉夫针布、轴承。

Product: My Secretary is a long-term mass-produced products: Gate Scaffolding series products (door frame, rod, backwater, base connecting Xiao, staircases, bridges, etc.), adjustable steel support roof racks, steel pipe gate row , bowls button scaffolding series (bar, Pole, oblique strokes, linked to the foot plate, block feet, etc.), bananas first Scaffolding Series (Pole, bar, oblique strokes, Wang shoring, pedal, widening brackets, Guardrail aircraft, etc.), button chrysanthemums, such as scaffolding and exports of domestic products.

产品：我司现长期大量生产的产品有：门式脚手架系列配套产品（门架、拉杆、顶托、底座、连接肖、楼梯、网桥板等）、可调节钢支顶架、排栅钢管、碗扣式脚手架系列（横杆、立杆、斜杆、挂钩脚踏板、挡脚板等）、香蕉头式脚手架系列（立杆、横杆、斜杆、横撑、踏板、加宽托架、护栏架等）、菊花扣式脚手架等国内产品及出口产品。

Comparing with boring bar,numerical results reveal that boring bar with dynamic absorber has the effect of vibration decrease.

通过和普通镗杆对比分析，结果表明动力减振镗杆有效地达到了减振效果。

A sample analysis is given, and the stress distribution within the boring bar and the maximum deflection are obtained under a given cutting condition, at the same time, the comparative analysis with a common type boring bar with the same size is pursued.

给出了分析实例，得到了该种镗刀杆在给定切削条件下的应力分布以及最大挠度并与相同尺寸的普通镗刀杆进行了对比分析。

The outer diameter of the boring bar is strictly limited by the size of the bored hole. In order to solve this problem, the first new structural micro-boring bar system with the function of active error compensation was developed.

在车削、铣削和磨削等外表面加工中，误差补偿用微进给刀架的结构形状、尺寸和体积都没有严格的限制，误差检测传感器和补偿驱动传感器能够方便地安装在微进给刀架内。

This paper introduced the mechanism of vibration in the process of deep hole boring ,developed a dynamic modal of the damping boring bar,optimizing the parameters of the damping system,analyzed the transient dynamic and harmonic response of the damping boring bar.

介绍了深孔镗削加工过程中产生振颤的机理，建立了减振镗杆的动力学模型，在此基础上优化减振系统的参数，并且对减振镗杆进行瞬态动力学和谐响应分析，分析结果表明该减振系统具有良好的减振性能。

The boring bar was designed into a new structure consisting of two coaxial bars. As a result, the micro-boring bar can be made with relatively smaller outer diameter, which was suitable for boring smaller and deeper hole, even the measuring and compensating sensors have been incorporated.

但是，在镗削加工中就遇到了较大困难，因为镗杆的径向尺寸受到被镗孔尺寸的严格限制，用于误差在线检测的传感器和用于误差在线补偿驱动的传感器不能直接安装在镗杆内。

Since the polymer bar material has a lower mechanical impedance than the concrete specimen, spalling can be produced in the concrete rod after the compressive wave in the concrete specimen is reflected back as a tension wave at the concrete/buffer bar interface.

由于波在粘弹性材料中的弥散效应，吸收杆中透射波形会发生变化，但三维有限元分析表明，在利用吸收杆上透射波确定混凝土层裂强度时弥散产生的影响可以忽略。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样