介绍了大变位齿轮的特点，变位系数的设计准则。
This article introduces the characteristic of big modified gears and its design criterion.
在此基础上，本文给出了双圆弧齿轮传动的小振动、低噪声设计准则。
On this basis, a design criterion of small vibration and low noise for the dual circular-arc gears is given out in this paper.
本文介绍了内啮合齿轮泵齿轮设计的准则及应注意的几个问题。
This paper introduces the criterion and some noted problems of gear design for internal gear pump.
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