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 …
کانی سیلیکات کلسیم و کربنات کلسیم آبدار در سال ۱۹۵۷میلادی کشف و به افتخار دانشمند ایرانی، ابوریحان بیرونی به نام …
Tennessee Tuxedo the penguin and his best friend Chumley the Walrus regularly escape from the Megapolis Zoo only to find …
Below is the ASTM A17 (the oldest standard I have) which withdrawn in 1945. The American Society for Testing and …