Based on the wear curve of lands of erosion guns and a calculation method of engraving pressure, an interior ballistic model with the engravingprocess is established.
以烧蚀火炮的阳线磨损曲线和一种挤进压力计算方法为基础，建立了考虑弹带挤进过程的内弹道模型。
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First it was the U. S. Bureau of Engraving and Printing's next-generation $100 bill production process, in Washington, D. C. On Wednesday, it was the U. S. Mint here, to see how coins are made.
To avoid the pattern being distorted in the process of numerical control sculpting on a complex surface, a new method is put forward to generate the tool-path of engraving on the surface.