轴管

At last, the experiment of tube hydroforming was carried out in the guidance of the theory analysis. Experimental results of different load path are presented and the rule of the effect of internal pressure and axial force are studied. Based on the experiment, the basic rule of load control method is also discussed.

在分析的基础上，本文还完成了不同的轴向力和内压匹配作用下管坯内高压成形过程的实验工作，得到了不同工艺参数对零件成形的影响规律，还在实践的基础上提出控制加载的基本原则。

When an intermediate frequency electromagnetic field of 12 kW with the frequency of 2500Hz, high quality hollow billets can be gained. Horizontal electromagnetic continuous casting of copper tube blanks was proposed.

当施加功率为12kW、频率为2500Hz的中频电磁场时，得到了表面光滑、宏观凝固组织中具有高等轴晶的比率的高质量空心管坯。

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可程式恒温恒湿箱、高低温试验箱、盐水喷雾试验机、干燥箱、热老化试验机、耐寒/耐黄变试验箱、冷热冲击试验机、灼热丝试验机、垂直+水平燃烧试验机、漏电起痕试验机、按键寿命试验机、插头插座负载寿命试验机、弹簧试验机、90度剥离强度试验机、破裂强度试验机、环压强度试验机、纸管/纸箱抗压试验机、耐磨擦试验机、插拔力试验机、转轴寿命耐久试验机、手机翻盖寿命试验机、鼠标滚轴寿命试验机、振动试验机、模拟汽车运输振动台、手机跌落试验机、包装跌落试验机、电线曲挠试验机、插头线突拉试验机、静态拉力试验机、线材弯折摇摆试验机、线材伸长率试验机、万能材料试验机、拉力试验机、落球冲击试验机、耳机疲劳寿命试验机、耳机拉伸寿命试验机、推拉力计、布、洛、维、肖、里、邵氏硬度计、影像测量仪、精密测绘显微镜、数字投影仪、体视显微镜、金相显微镜、读数显微镜、连续变倍显微镜、放大镜、卡尺、千分尺、标准砝码、高度计、厚度计、岩石平板、电子计重称、电子计数称、电子天平、分析天平、标准光源箱等。

The monotone property of multivariate function proved that the maximum stress strength point exists on the inner surface of

应用多元函数单调性理论，证明了在三轴应力条件下管体中最大应力强度值出现在套管内壁。

When the reel on the reel diameter capillary gradually increases, like turning round trip, using the lever principle, continuously variable belt tensioning force the initiative under the round rotating movable pulley disc produce axial movement of the work of change with diameter, pipeline so that the speed of reel hair always synchronized with the tractor forward speed.

当卷筒上毛管卷盘直径逐渐增大时，仿行轮转动，利用杠杆原理，无级变速带在张紧轮旋转下迫使主动带轮可动盘产生轴向移动，改变带的工作直径，从而使卷筒毛管线速度始终与拖拉机前进速度同步。

The thickness of myelin sheath of experimental group was inferior to that of group B (P.05) at the third month, while the number and diameter of axons in both groups was similar.

这种无细胞基膜管移植体能支持轴突的生长和雪旺细胞的迁移，是一种良好的神经移植替代材料。

Furthermore, by using Natori theory on the field-effect transistor we study the current-voltage characteristics of deformed carbon nanotube field-effect transistors.

在紧束缚理论的基础上，推导出轴向拉伸和扭转形变时碳纳米管的能带公式。

Airbrush,spray gun, needle,nozzle,handy tools,kinves,blades,CNC machined parts,reparied tire gun, drill pump...

喷笔，喷枪，压缩机，心轴，喷嘴，手工工具，刀片，纱管，车工零件，补胎枪，抽水机。。。

The mathematical model and optimized result indicate that the magnetic field in the inner wall of the detecting coils is of non homogeneity. At a ratio R/L .2, the magnetic field along the axial length and within the range of 90% radial direction is nearly homogeneous.

数学模型和优化结果表明：在检测传感器线圈中部范围内为非匀强磁场，且呈非线性变化，细长管磁场相对均匀；当选取 R/ L 。2 ，磁场在线圈轴向长度范围内，径向在90 %范围内可近似看作均匀磁场。

On the principle of the parallel four link rods machanism, using two group parallel and equal distance spring slices, by a series of mechanism links, the position changes of rods and measure head on two grooves were showed by measuring meter in order to measure the change amount of two groove distance on central spindle of spinning bearing .

本文运用了机械原理中平行四杆机构原理，采用两组平行等距弹簧片组，通过一系列结构连接，使杆、管臂测头在两沟道中的位置变化，由测量仪表显示出来，从而达到测量纺杯轴承心轴上两沟间距离的变化

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。