螺旋管

In this dissertation, modern MD simulation techniques are utilized to fully analyze the influences of molecular force field, diameter and helicity on static and dynamic properties of confined water within CNTs.

验证了力场并不改变水分子进入(6，6)碳管的这一本性并发现管径和螺旋性可能会造成受限水性质的不同。

Comparison of calculated results with those from experiments indicates that the Nu number and ...

所开发的程序为新型高效螺旋槽纹管的开发研制提供了新的途径

This paper studied the calculating method of the spiral-fluted tube's spinning force, which can provide basic theory for designing spinning shaping equipemnt, establishing spinning shaping technology and designing spinning tools.

摘 要：研究了薄壁圆管螺旋槽旋压成形时力的计算方法，可为设计旋压成形设备、编制旋压工艺、设计旋压工夹具提供理论依据。

The investigation results can be applied to heat exchanger design and optimization of geometrical parameters of spirally corrugated tubes.

研究结果可用于换热器设计及优化螺旋槽管几何参数。

Abstractly, using ANSYS software simulates roll-pressing course of spirally grooved tube by three-dimension numerical simulation and experimental research.

在理论上，应用有限元软件ANSYS对螺旋槽管的滚压过程，进行了三维数值模拟研究及试验研究。

Replace column bolt spring and it can be applied to small multifunctional clutch. Lock for hanging tube machine, hauling mode's trig, sectional wheel's abandon, overloading, and the locking up for the pulley group of crane's hook.

取代圆柱螺旋弹簧，适用小型化，多功能如炼焦炉门锁紧，离合器、吊管器锁紧、拉伸模、制动器锁紧，区轮舍去过载，超重机吊钩滑轮组的锁紧。

Therefore, the researches on variable structure and configurations of swirling flow junction are conducted in this paper.

这是值得探索的问题，因而本文对螺旋流三分支管的变型、变结构流动特性进行了分析。

The residual stress distribution of the tangential residual stress,the hoop residual stress and the normal residual stress test of spiral seam arc weld pipe were studied on the basis of elastic mechanics analysis and superposition theorem.

基于弹性力学应力分析和叠加原理，研究了螺旋缝埋弧焊管切环法残余应力测试中的残余应力分布。

We also have a joint-venture factory for production of OCTG threader protectors, with annual production capability of one millions pairs of threader protectors for casing, tubing, line pipe, drill pipes.

公司此外还经营直缝埋孤焊、高频电阻直缝焊、螺旋焊等焊接石油天然气输送管，为国外用户代理采购钻机、修井机、抽油机、测井设备、顶部驱动钻井装置、泥浆泵、特车、固控设备、井口工具等产品。

The ridge－loaded helical traveling wave tube is a new kind of high power millimeter wave device. The "hot" dispersion equation of this circuit loaded with an electronic beam is presented in this paper, and the Downhill method is used to solve the transcendental equation.

脊加载螺旋槽行波管是一类新型毫米波大功率器件，给出了此结构中引入电子注后的"热"色散方程，并利用"牛顿"下山法求解了此复系数超越方程。

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％。