为了保证轧制生产顺利进行和获得尺寸精度高、性能好的产品，必须对半连轧生产过程的轧制工艺参数进行准确地预测。

In order to keep the productive progress smoothly and obtain high size precision, good performance product, the rolling craft parameter must be simulated accurately.

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一旦设定了合适的成型参数，产品的实体尺寸，重量和其他物理性能将保持稳定。

Once the optimum parameters are set, the physical dimensions, weight and other physical properties of the part will stay almost constant.

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阐述减振器机械密封的原理和优点，介绍其结构参数设计包括弹簧设计、油封材料选用和尺寸设计以及O型密封圈沟槽设计等，可供产品开发参考。

This paper describes the principle and merits detailing the design of structure parameters including spring, seal material selection, dimensions and the slot of O-shape sealing ring.

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