เลขเด็ด"ปฏิทินหวยแม่นๆ"ลองชม#16/5/62
Soon after the first machines successfully lifted off it was time to think about the safety of the pilot and later of the crew and of course the passengers. Time went by and travelling with airplanes became much more affordable, and since there were more and more airplanes in the sky, it was absolutely necessary to improve the safety.
from: http://ezinearticles.com/?Avionics---Safety-For-the-Passengers-and-the-Crew!&id=3173339
