1·The rarefying process of insulation is expounded, and the technological parameters for vacuum drying at low temperature are determined.
论述了绝缘抽真空过程，确定了低温真空干燥工艺参数。
2·In this situation, (rarefying) and smoothing data is needed. This paper introduces an algorithm of smoothing and rarefying for (automatically) generated contour.
针对这种情况，需要对数据进行圆滑或抽稀处理，这里介绍了对自动生成的等高线进行圆滑和抽稀处理的一种算法。