خواندن بعدی
When I started working at an engineering company, I fully understood that performance of an engineer depends on myriad factors. At the same time, I saw these two images in one of Joseph Edward Shigley’s books and saved them. Influences …
Before the spread of the Internet, everyone dealt with letters and stamps. One of the pastimes of that time was to separate the stamp from the envelope and keep it. I also had a stamp album when I was a …
Traditional Metal Identification Techniques
