工件

The mathematics model of immediate thermal deformation with mean coefficient of linear thermal expansion and thermal expansivity is built.

理论上建立了平均线膨胀系数同瞬间线膨胀系数计算热变形的误差数学模型，并通过实验论述了精密工程应用中使用平均线膨胀系数计算的工件热变形误差较大，提出广泛使用瞬间热膨胀系数替代平均线膨胀系数是提高机器设备精度的发展趋势。

It is demonstrated that the error of thermal deformation with mean coefficient of linear thermal expansion is more high, so that it is certain trend to use immediate thermal expansivity instead of mean coefficient of linear thermal expansion to improve the instruments accuracy in precision engineering.

理论上建立了平均线膨胀系数同瞬间线膨胀系数计算热变形的误差数学模型，并通过实验论述了精密工程应用中使用平均线膨胀系数计算的工件热变形误差较大，提出广泛使用瞬间热膨胀系数替代平均线膨胀系数是提高机器设备精度的发展趋势。

The factory equipment, strong technical force and strong research capabilities to meet user workpiece field test needs.

本厂设备、技术力量雄厚和较强的科研能力以满足用户工件现场试验的需要。

Furnace Door made by the plate, a jigsaw puzzle inside a lightweight firebrick insulation tiles in the Furnace Door open a central observation of theworkpiece heating holes, in order to prevent heat from Lost in the hole, fill the hole with a layer of transparent film Mica, the open and close of Furnace Door are completed by the handle.

炉门由钢板制成，里面砌有保温砖有轻质耐火砖，在炉门中央开有一个观察工件加热情况的小孔，为了防止热量从孔中逸散，在孔内填有一层透明的云母片，炉门的启闭是由手柄机构来完成的。

Furnace Door made by the plate, a jigsaw puzzle inside a lightweight firebrick insulation tiles in the Furnace Door open a central observation of the workpiece heating holes, in order to prevent heat from Lost in the hole, fill the hole with a layer of transparent film Mica, the open and close of Furnace Door are completed by the handle.

炉门由钢板制成，里面砌有保温砖有轻质耐火砖，在炉门中央开有一个观察工件加热情况的小孔，为了防止热量从孔中逸散，在孔内填有一层透明的云母片，炉门的启闭是由手柄机构来完成的。

Experimental results show that after compensation flatness of machined part whose diameter is 100mm is reduced by 80%.

实验结果表明：补偿后工件的圆柱度误差减小了60％，母线直线度误差减小了80％。

The refraction, reflection and propagation of the acoustic wave in a rod are studied quantitatively when a line-focused probe is employed in an axial scanning in immersion testing. The shape and position of the first and second focal line of the probe in the cylinder are calculated.

定量研究了采用线聚焦探头、液浸法、轴向扫描探伤时，棒材中声波的折射、反射和传播规律，计算得到了工件中的一次焦线和二次焦线的形状和位置。

Main Usage and Features:MG7340(MM7340) The MG7340(MM7340) is a high－precision surface－grinding mac- hine to process disc cutters, friction plates, saw blades, valves, piston rings,and other ring shape work pieces.This machine is able to be used in tool plants, bearing plants, valve plants, and other highly precisely grinding processing industries.

主要用途和特点：MG7340（MM7340） MG7340（MM7340）型高精度卧轴圆台平面磨床主要适用于磨削加工盘形刀具、摩擦片、锯片、阀门、活塞环等环形工件，可广泛应用于工具厂、轴承厂和阀门及一般机械制造厂进行精密零件的磨削加工。

The M7350、M7363 type horizontal spindle surface Grinder with Rotary Table Particularly for girnding of work piece in ring shape,friction wa- fer,saw plate.scaled disk.

M7350、M7363型卧轴圆台平面磨床主要适用于磨削、盘型刀具、摩擦片、锯片、分度盘活塞环等圆形工件。

Analysis was also made on the influence upon the grinding forces in case of the same friction factor between wheel and workpiece at different grinding speed, as well as in case of different friction factor between wheel and workpiece at the same grinding speed.

分析了砂轮与工件表面之间的摩擦系数相同而磨削速度不同时对磨削力产生的影响，以及磨削速度相同而摩擦系数不同时对磨削力产生的影响。

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。