工件

Before machining,the NC programs must be checked to examine whether thetrajectory is right or not , whether the tool will overcut or without cut.

在数控加工中随着工件复杂程度的增加，尤其是鞋楦这样的复杂曲面，其数控加工程序的正确性无法靠人工检查。

The most common is the oxyacetylene welding, namely the use of acetylene and oxygen produced during combustion of oxyacetylene flame to melt the workpiece and the wire heating, condensation formed after the seam welding method.

最常用的是氧乙炔焊，即利用乙炔和氧混合燃烧时所产生氧乙炔焰，来加热熔化工件与焊丝，冷凝后形成焊缝的焊接的方法。

It is formed from controllable slide block mounted in guideway, length-fixed drive rod capable of driving slide block and making it move in guideway, controllable telescopic shaft and mobile and turnable working table consisting of moving platform for mounting cutting tool and working table for mounting workpiece, and utilizes the drive rod, controllable telescopic shaft, moving platform, slide block and guideway to form the invented redundant drive plane parallel closed link mechanism with several functions of cutting, grinding, load-shifting and assembling, etc.

由安装在导轨中的可控滑块、驱动滑块在导轨中运动的定长驱动杆、可控的伸缩轴及安装切削刀具的动平台、安装工件的工作台构成的可移动和转动的工作台组成。并由驱动杆、可控伸缩轴、动平台、滑块、导轨构成冗余驱动平面并联闭链结构。该装置既具有切削、磨削、移载、装配等多种功能，又具有简单结构、大作业空间和刀具实现姿态能力，以及优先的加工方向等优点的并联机床新结构。

Then the relation curve between every parameter and the removal amount is obtained, and the rules of material remove are summarized.

获得了它们之间的关系曲线；得出了工件材料去除的规律；确定了液体喷射抛光时的最佳参数组合。

Bull; Parametric programming, to automatically update the programme when the size of the manufactured piece change, thus avoiding having to write a new programme

当加工工件的尺寸改变时，参数编程自动更新程序以避免重新写一个新的程序。

In this paper, on the basis of theoretical analysis, methods of range analysis and variance analysis are separately applied to the quantitative analysis of the relationship among gap voltage, peak current, workpiece thickness and cutting direction in the process.

本文在理论分析的基础上，采用正交试验设计，应用极差分析法和方差分析法定量研究了高速走丝电火花线切割加工中放电间隙电压量的变化特性与加工中峰值电流、工件厚度及切割方向之间的关系。

To the relatively small thermal penetration depth within the workpiece and the continuous removal of grinding chips.

由于在工件内相对较小的热渗透深度和不断去除的磨削碎片

Depth of penetration of a cutting tool -- to inches dollars -- is the tool to the work piece distance.

切削速度是切削刃通过工件表面的速率，它是以每分钟英寸来表示。

The machine Equipped with chain-type tool changer which can process pentahedron, milling, boring, drilling and reaming during once clamping.

配置刀库，可一次装夹工件进行铣、镗、钻、攻等工序加工，自动化程度高。

The method is :there are two perpendicular axes whose distance are controlled ,one is the axis of work table, the other is fixed with a microscope for aiming.

该测量方法是：两个相互垂直且间距可调的数控回转轴，一轴与工件的回转中心重合，另一轴上固定可移动的瞄准显微镜，当显微镜瞄准被测孔时，两轴的转角由各自的圆光栅测出，两轴之间的角度位置确定曲面壳体零件上小孔的孔位置，同时采用CCD摄像头，利用图象处理技术实现小孔的尺寸测量。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。