中杆

In consideration of the problem of drill pipe bending steering in radial horizontal well drilling, ANSYS software is used to simulate its major influencing factors, such as slideway trajectory curvature, clearance, working pressure, roller shape and position and thickness of drill pipe by establishing a finite element model for the bending steering mechanism.

针对径向水平井钻进中钻杆弯曲转向前进运动困难的问题，通过建立弯曲转向机构仿真有限元模型，对其主要影响因素：滑道轨迹曲率、间隙、工作压力、滚轮形状与位置和钻杆壁厚等用ANSYS软件进行仿真研究。

Press the spring-loaded rod inward to hold the ball in the mechanism, and tighten the thumbscrew to hold the rod in place.

向里按下加载弹簧杆，将小球固定在释放装置中，然后上紧拇指螺丝，将杆固定好。

In view of the conventional measurement in tie bar internal force,wire vibrating frequency measuring method and strain pieces measuring method for pipe fraction factor are compared.

比较分析了粘贴应变片法和弦振频率法在系杆内力监测中的应用情况，并根据实测数据对系杆管道磨阻系数进行调整，减少其和实际测试结果的偏差。

For a given mechanism, the coupler points passing through two acceleration poles are the double points on the loci of acceleration poles described on the coupler plane. Furthermore, the two mechanisms with a coupler point tracing through two acceleration poles are synthesized by utilizing the derived parametric equations.

接著，利用耦杆平面之加速度极心轨迹的交点，作为机构中可通过两个加速度极心的耦杆点，并且配合已推导出来之参数式，合成通过两个加速度极心的机构。

A method to develop a reciprocating translation with uniform moving velocity was provided.

在某些机床中，往复运动基本上是用曲柄摇杆机构或曲柄导杆来实现的。

Through analyzing the cutting theory for the teeth of Archimedes worm and worm wheel ,this paper studies the method of modeling the worm transmission based on SolidWorks software and establishes the corresponding mathematics model.

通过对阿基米德蜗杆蜗轮齿面切削原理的分析，探讨了在Solid Works软件中阿基米德蜗杆传动的建模方法，并建立了相应的数学模型。

At last, the worm and grinding wheel models are used to realize grinding simulation of worm gearing with C++ programming language and OpenGL interface tool which are known as a basic tool for visualization in scientific computing.

最后，为了实现砂轮磨削蜗杆的运动仿真，论文应用科学计算可视化的基础工具OpenGL，并将前面得到的蜗杆和砂轮模型，导入到OpenGL中编程，语言环境为C++，实现了运动仿真。

3The microcosmic analysis of drill pipes: Through comparison metallographic analysis of drill pipes, this paper finds out the ultimate reason which its" performance are difference, then uses SEM to analyze drill pipes and studies crack and acanthopore, measures local chemistry component and the influence that Shot-peened to performance of drill pipes in it"s inside thickening transitional region, measures microcosmic rigidity of drill pipes.

本文的创新点：(1)提出了钻杆失效的过程和概念模型，即内表面缺陷-解理断裂-裂纹疲劳扩展-过载断裂，为解决钻杆失效分析中存在的困惑(各项基本检测参数基本合格，刺穿和断裂仍有发生)提出了分析方法和手段。

It was demonstrated that BDF-H16 was an gram-negative bacterium and had a bacilliform or arc bacilliform shape with a flagellum at one end.

结果表明：蛭弧菌BDF-H16为革兰氏阴性菌，杆形或弧杆形，端生一根鞭毛，菌体大小多为0.2μm～0.5μm×0.8μm～1.2μm；蛭弧菌BDF-H16对实验所选用的革兰氏阴性菌和部分革兰氏阳性菌均有裂解作用；以大肠杆菌为宿主菌，其最佳生长条件为宿主菌浓度6.75×10~9cfu/mL、pH7.0～7.5、温度28℃；在NaCl含量0.85%～5.00%的培养基中能够生长；恩诺沙星、诺氟沙星对其有抑制作用。

It was demonstrated that BDF-H16 was an gram-negative bacterium and had a bacilliform or arc bacilliform shape with a flagellum at one end.Its size was mostly 0.2μm～0.5μm×0.8μm～1.2μm.It had a wide prey area and could lyse all tested gram-negative bacteria and some gram-positive bacteria. The best lysis conditions to Escherichia coli were 6.75×109cfu/mL of prey bacteria concentration、pH7.0~7.5、28℃. It could grow in the solid culture added 0.85%~5.00% NaCl and was inhibited by enrofloxacin and norfloxacin.

结果表明：蛭弧菌BDF-H16为革兰氏阴性菌，杆形或弧杆形，端生一根鞭毛，菌体大小多为0.2μm～0.5μm×0.8μm～1.2μm；蛭弧菌BDF-H16对实验所选用的革兰氏阴性菌和部分革兰氏阳性菌均有裂解作用；以大肠杆菌为宿主菌，其最佳生长条件为宿主菌浓度6.75×109cfu/mL、pH7.0～7.5、温度28℃；在NaCl含量0.85%～5.00%的培养基中能够生长；恩诺沙星、诺氟沙星对其有抑制作用。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐