弯曲点

Measure the mid-point of the wire, and make a 90 degree bend.

量出电线的中间点，将它弯成90度角，弯曲的角要弄得尖一点。

OBJECTIVE: To detect the mechanical properties of bovine bone nail following different degrees of dehydration using the three-point bending mechanics tests.

目的：通过三点弯曲生物力学检测不同脱水程度对牛骨钉力学特性的影响。

The 3PB specimens were used to study the fatigue fracture behavior of these weldments.

用三点弯曲试样对这些焊接结构的疲劳特性进行研究。

If backward.curved al e—used.curvature results in a lower tip speed for the same head,which diminishes the erosive effect Of ash particles.

如果使用向后弯曲的叶片，曲率形成了一个低速点可以减小粉尘颗粒的腐蚀作用。

Models of middle-segment oblique fracture without defects were established and fixed by 14-hole stainless steel AO limited contact-dynamic compression plate, using 6, 10, and 14 screws separately. The stress-strain index under torsion, three-spot bending and compression of the complete fresh tibia was determined again statistical analysis.

然后制成中段斜行无缺损骨折模型，以14孔不锈钢AO有限接触型动力加压接骨板固定，分别使用6， 10， 14枚螺丝钉，测定扭转、三点弯曲、压缩等应力－应变指标，进行统计学分析。

MAIN OUTCOME MEASURES: Vertical and lateral strain values under different vertical compressions, mean torques under different torsion angels, and vertical strain under three-spot bending compression of different stress loading following 6, 10 and 14 screw fixation.

主要观察指标：6枚，10枚和14枚螺丝钉固定不同压缩力垂直压缩时竖直方向应变及侧方应变值，不同扭转角度扭转时平均扭矩及不同加载应力三点弯曲压缩竖直方向应变。

Using dual energy X-ray bone density instrument XR-36 model to detect the bone mineral density of the left femur of the rats. Using the strain test system, we examined the biomechanics index according the tension and three-spot bending test; we also examined the bone calcium of the lumbar vertebra through plasma emission spectroscopy . We examined the serum calcium and magnesium by using the nomal biomechanics method,and examined the serum acid phosphatase and osteocalcin by using the Elisa method.

使用NORLAND公司XR-36型双能X线骨密度仪，采用小动物骨密度测定软件，测定大鼠左后肢股骨的骨密度；使用应变测试系统，按股骨拉伸和三点弯曲试验，测定股骨生物力学指标；以等离子体发射光谱法测定腰椎骨骨钙含量；以常规生化法测定血清钙、镁含量及血清酸性磷酸酶含量；以Elisa法测定骨钙素含量。

To solve the problem, a three-point bending test was put forward.

中文摘要：针对以Q450NQR1钢为基板、B级钢为腹板模拟实际工装位置，疲劳断裂与货车运营实际工况不符的问题，提出以B级钢为基板、Q450NQR1钢为腹板进行三点弯曲疲劳试验，诱使疲劳裂纹向B级钢侧扩展，研究了MAG气体保护焊B级钢/Q450NQR1钢搭接接头的疲劳性能。

It is shown that the contact interaction enables bottom drillstring to whirl backward, and then an alternate bending stress with higher frequency is produced. So the drillstring fatigue failure could be accelerated. At the same time, a quite strong wallop force of high frequency is produced on the contacting point, and the contacting zone is next to the screw coupling of drill collars. It will easily result in the failure of screw couplings. The research results provide theoretical basis for the prevention of drillstring failure.

研究表明，下部钻柱与井壁的碰摩作用使下部钻柱反向涡动，产生高频的交变弯曲应力，会加速下部钻柱疲劳破坏；下部钻柱与井壁接触点处存在较大的高频冲击力，并且接触区域靠近钻铤螺纹联结处，更容易诱发螺纹联结处失效，该研究成果可为预防钻柱失效提供理论依据。

Approach the point of lift-off with your legs bent hard, your centre of gravity really low and as close to the centre of your stance as possible.

接近点剥离与您的腿弯曲硬，你的工作重心真正低和接近中心的立场可能。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。