خواندن بعدی
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 …
امپراتوری “زمخت و سنگین” آهن و فولاد رو به افول گذاشته و غیرآهنی ها و رنگین ها و کمیاب ها …
Stainless Steel is defined in ASTM A 941 as follows: A steel that conforms to a specification that requires, by mass percent, a minimum chromium content of 10.5 or more, and a maximum carbon content of less than 1.2 There …
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 …
