The paper analyses the weldabilities of four kinds of dissimilar metals welding joints and also discusses the design of welding grooves, selection of filler metals and welding code.

本文分析了高压氨洗塔中四种复杂的异种钢接头的焊接性能，对接头坡口设计、焊材的选用、工艺规范的选取进行了深入的探讨。

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The basic principle of design and. operation of a honing machine in crossing spiral grooves is introduced, in this article.

本文介绍了交叉螺旋槽式珩磨机的基本设计和工作原理。

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In order to improve single productivity, and got parameters of steel ball rolling, This paper has done pass design and experiments of two grooves rolling steel ball.

为提高球磨钢球的单机生产率，并获取钢球轧制的力能参数，进行了钢球双头轧制孔型设计及实验。

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