NOT KNOWN FACTS ABOUT ملک

At transonic speeds (near the pace of audio), it can help to sweep the wing backwards or forwards to cut back drag from supersonic shock waves as they start to kind. The swept wing is simply a straight wing swept backwards or forwards.گوتارد اکسپرس، سوئیس، ۱۸۹۷ آغاز به کار قطارها به سدهٔ ۱۵۰۰ میلا