قصدم این است که هر هفته، یکی از کتابهایی که خواندهام را در اینجا معرفی کنم. خیلی با جریان روز …
When comparing steel standards from different national and international standard development organizations, there is no such thing as equivalent steel standards. At best, one may be able to group comparable steel standards together based on some defined set of rules. …
The below image is a Self-portrait by Curiosity on Mars in October 2015. Curiosity is a car-sized Mars rover explorer that was launched from Cape Canaveral on November 26, 2011 and landed on Mars on August 6, 2012, after a …
