杆

In this study, the multi-action die is designed and developed by using a set of screws and the forging simulation is conducted by using plasticine to investigate the optimum conditions for the design of the screws.

本研究利用一螺杆组为复动化之机构，进行复动化锻造模具设计开发，并以塑性黏土为胚料进行模拟，探讨此螺杆组之最佳设计条件。

This paper introduces different mechanical rod break-out modes,their structures,characteristics and operating programs of top-drive power head drill.

介绍了动力头式钻机的几种机械卸扣方式及其结构特点、操作程序，其中包括先卸钻杆下扣的上扣防松器、活动提篮上扣防松装置以及先卸钻杆上扣的上垫叉座装置。

It is used to solve the rod string optimal design issue of the rod pump system.

介绍了MATLAB优化工具箱及其算法的原理和过程，并将其应用于求解有杆抽油系统杆柱组合优化设计问题中。

Some basic theories and studies of rod pump test equipment such as displacement sample curves are introduced.

分析了几种现有有杆泵动态测试装置的总体方案，以及有杆泵动态测试装置伺服机系统目前已有研究基础及成果，给出了伺服机系统的样本曲线。

With the model, torque change in both the pump and pumping rod along the wellbore could be obtained.

利用该模型可获得井筒中任意部位及螺杆泵处抽油杆扭矩的变化情况。

No research theory of remaining lifetime of pump rod can be used to in-situ, and can not diagnose it remaining lifetime by engineering examine at present.

目前研究抽油杆剩余寿命的理论方法没有一种可直接应用于现场，无法直接通过工程检测手段来判断抽油杆的剩余寿命。

The turning fixture and the feeding device of the pump rod joint can be used to realize the automatic discharging.

结果表明，抽油杆接箍车削上料装置用于抽油杆接箍生产在技术上是可行的，在实际生产过程中可以实现一人控制多台机床进行生产，整套系统在运行过程中也表现出极好的运行性能和安全性能。

On the basis of drawing on the technology and experiences of tower assembling and erection for 500kV and 750kV transmission lines in China, such methods suitable to the tower assembling for UHV transmission line as inside suspension pole with outside pulling wires, ground rocker pole and tower crane are adopted and applied in UHVAC test and pilot project, pursuantly the task of tower assembling and erection in this project is completed, from this a lot of practical experiences are achieved and can be available for reference to subsequent engineering and construction..

文章在借鉴我国500 kV和750 kV架空输电线路组塔施工技术和经验的基础上，提出了内悬浮外拉线抱杆组塔、落地摇臂抱杆组塔、塔式起重机组塔等适合于特高压线路铁塔组立的方法。该方法已在特高压交流试验示范工程中得到应用，为后续工程建设提供了技术储备。

Quadrupole mass filter is a matured miniature mass spectrometer that has been widely used.

四极杆质谱仪是目前最成熟、应用最广泛的小型质谱仪之一。四极杆质量分析器通过在双曲面四极

To develop a rapid and accurate method for baculovirus titration, flow cytometry was adopted to quantitate baculovirus directly after staining with SYBR Green I.

为了快速而准确的测定杆状病毒的滴度，采用流式细胞术对经SYBR Green I染色后的杆状病毒直接计数。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。