On the basis of analysing composition and testing results of noise generated by highspeedpunch press the major noise sourse and the noise characteristics are pointed out.
在对高速冲床的噪声组成及其测试结果分析的基础上，指出了主要噪声源及噪声特性。
2
The lead frame structures of LET(light emitting triode)are much fine and with high yields, it is for highspeedpunch with very high precision and life.
发光三极管的引线框结构较为精细，产量很大，用高速冲床生产，对模具的精度和寿命要求很高。
3
On the basis of analysing composition and testing results of noise generated by highspeedpunch press, the major noise sourse and the noise characteristics are pointed out.