作者: Jim Wang 公众号: 巴博萨船长

摘要：本文内容涉及：机械加工时，用于指示加工质量的表面粗糙度的定义是什么？其计算方法与表示方法又是如何？各国工业加工对表面粗糙度的工业标准总结。各种加工工艺所能达到的表面精度总结与分析。

Abstract: The content of this article involves: What is the definition of surface roughness used to indicate the quality of machining during machining? What is the calculation method and representation method? A summary of the industrial standards for surface roughness in industrial processing in various countries. Summary and analysis of the surface accuracy that can be achieved by various processing techniques.

作者: Jim Wang 公众号: 巴博萨船长

摘要：为了解决部分内容网络分发时高延时的问题，为了提高网页加载速度，提高内容分发速度进而给客户跟好的使用体验，会考虑到CDN网络。如何使用aws CloudFront 与 aws S3 bucket的组合，创建自己的CDN网络，会在本文中介绍相关内容。

Abstract: In order to solve the problem of high latency in the distribution of some content on the network, in order to increase the loading speed of web pages, increase the speed of content distribution, and provide customers with a better user experience, the CDN network will be considered. How to use the combination of aws CloudFront and aws S3 bucket to create your own CDN network will be introduced in this article.