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Screw compressor rotor machining tool wear the geometric calculation method : screw compressor rotor milling and processing a grinding two methods, usually conducted in two phases processing; first stage is rough, when the workpiece to be processed about its size to the second stage of Finished, when the rotor be processed into its final size when completed.

螺杆压缩机转子加工有磨削和铣削两种方法，通常分两个阶段进行加工；第一阶段为粗加工，当工件被加工到它的大概尺寸即可；第二阶段为精加工，当转子被加工成它的最终尺寸时完成。

In the training of students making echelon screw thread by turning,the choosing and grinding of knife,putting knife into nip,putting workpiece into nip should be noticed;the lathe,choice of technics parameter,establishment of working steps should be adjusted.

在训练学生车削梯形螺纹时，要注意车刀的选择与刃磨、车刀的装夹、工件的装夹，要调整车床、选择工艺参数、确定工步。

The quality of the workpiece surface is subject to the side displacement of the saw blade to some large extent.

锯条的侧向位移在很大程度上决定了加工表面的质量，侧向位移过大工件表面质量得不到保证。

Italy,"Krakow" automatic sanding machine, from the substrate and semi-finished products to ensure the smoothness of the workpiece.

意大利&威雅&全自动砂光机，从基材与半成品确保工件的平整度。

Mainly for workpiece quenching after pit Furnace, box furnace, salt bath furnace and so on each kind of electric furnace heating.

主要供井式炉、台车炉、箱式炉、盐浴炉等各种电炉加热后的工件淬火使用。

Three-phase embed electrode salt bath furnace use the salt class as heating impregnant, according to the different operating temperature, could select different ingredient salt or compound salt, the salt is not electric beforemelting, therefore the salt bath furnace must use the starting-electrode to melt when using, because the electricity bring quantity of heat unceasingly through electric dissolving salt, so can maintain the dissolving state, because of electrode under the electromagnetic effect,make the dissolving saltcycle unceasingly through natural convection and magnetism mix round,therefore can well-proportioned heat workpiece rapidly.

三项埋入式电极盐浴炉采用盐类作加热剂，根据不同的工作温度，可选用不同成份的盐或混合盐，盐在熔化前是不导电的，因此盐浴炉使用时必须使用起动电极溶化，由于电流通过导电的溶盐不断产生热量，故可保持溶化状态，因电极在电磁力的作用下，通过自然对流和电磁搅拌而使熔盐不断循环，故可迅速和均匀的加热工件。

To regulate the spindle speed to the stable region can not only make the cutting process stable and achieve excellent workpiece surface, but also improve the metal removal rate by enlarging the cutting depth . The experiment results show that the limit cutting depth can be greatly improved.

将机床主轴转速调整到稳定区工作不但可以使切削过程稳定，获得优良的加工表面，而且可以通过进一步增大切削深度提高机床切削效率，本文对优控主轴转速下机床切削系统的极限切削深度进行了试验考证。

In addition, the protection of the workpiece treated by the copper, not bare hand contact, so as to avoid pollution of the hands sweat rust.

另外，工件经铜保护处理后，不可裸手接触，以免手汗污染生锈。

To the workpiece with changing thickness, the way formerly taked will take more time to prepare for welding, but it is a technology problem for RPT to settle it.

对于变截面厚度的搅拌摩擦焊，用原来的装卡方法装配准备时间会很长，而可调式摩擦头可以轻易解决这个技术问题。

The result shows that, when a free droplet transfer mode is applied in high-speed welding , the workpiece is heated by the arc throughout the process and thus the molten pool can not solidify in time.As a result, the molten pool is very long, which gives way to the instability of bead formareron and pinch effect of the liquid metal,so that it finally leads to the humping phenomenon. Based on the analysis and experimental result, the short-circuiting transfer mode is suggested to improve the bead formation in high-speed welding .

理论分析和试验结果均表明，采用自由过渡的熔滴过渡形式进行焊接，工件始终处于焊接电弧的加热下，在高速焊接时，熔池不能及时冷却，熔池明显拉长，由扰动引起的振动波长大，当熔池的拉长达到一定程度时，会发生液体金属的失稳和颈缩的现象，造成驼峰焊道。

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。