The experiments prove the effectiveness of semi-active friction in lowering the pressure of backward extrusion for cup-like pieces of rolling bearing steel.

In the second part of the paper, the technology parameters of backward extrusion parts are optimized.

其次，论文对反挤压零件的工艺参数进行了优化。

A Research on Unstable State of Backward Extrusion Pressing

反挤压不稳定状态的研究

Varying law of extrusion force in process of backward extrusion

反向挤压时的挤压力变化规律

Based on rigid-plastic finite element method, backward extrusion process of TB10 titanium alloy cylinder was simulated numerically.

基于刚塑性有限元法，对TB10钛合金筒体反挤压过程进行数值模拟。

The Application of the Backward Extrusion in the Fabrication Process of Silver Alloy Materials

反向挤压在银合金材料加工中的应用

Calculated deformation rule has some reference to the design of backward extrusion process.

计算得到的变形规律对于链条滚子的反挤压工艺设计具有一定的参考作用。

The Slab Solution for Biconical Punch for Backward Extrusion of Cup-like Piece

双锥冲头反挤杯形件的主应力解

The Simulation of Cup Backward Extrusion Process

杯形件反挤压成形过程模拟研究

The set-up is designed for experiments of backward extrusion under conditions of semi-active friction and can be used in practical production as well.

设计了可用于实验和生产的半积极摩擦反挤压的实验装置。

Influence of backward extrusion punch shape to the extrusion process

反挤压凸模形状对挤压成形工艺的影响

The Comparison and assess of Calculating Methods of Backward Extrusion Pressure for Aluminum Alloy Cups

铝合金杯形件反挤压力计算方法的评比

Based on the optimized parameters, the backward extrusion and ironing formation technology experiment of shell parts is done.

接着，论文用优化的工艺参数对电池壳体零件的反挤压+变薄拉深成形工艺做了试验，归纳了反挤压和变薄拉深的模具设计要点和经验。

With each pulse of the laser beam, a tiny amount of corneal tissue is removed.

每一次激光束的脉冲移除微量的组织.

That a tiny amount.

那只是很少的水量.

We were hopelessly lost, tired, hungry and, to crown it all, It'started to rain.

我们完全迷路了, 感到疲乏和饥饿, 而且更糟的是, 天又开始下起雨来了.

It is cold, rain, and, to crown it all, we have to walk home.

天气寒冷, 又下著雨, 而最倒霉的是, 我们得走著回家.

To crown it all, I lost my cell phone there.

更糟糕的是, 在那里我丢了手机.

It was cold, raining, and, to crown it all, we had to walk home.

天气寒冷, 又下着雨, 而最倒霉的是, 我们得走着回家.

This an overall review about the development of synthesis and applications of chiral crown ether compounds.

对近几年来的手性大环冠醚化合物的合成及应用研究进展作了较为全面的综述.

To first-class management, first-class quality, first-class reputation and first-class efficiency, achieve a new leap-forward development.

以 一流 的管理 、 一流 的质量 、 一流 的信誉和 一流 的效益, 实现新的 跨越式 发展.