ไม่ต้องรอแล้วจ้าๆ หนุ่มบรบือ มาแล้วๆ งวด 2/5/62 มีเลขดังต่อไปนี้?
Titanium alloys first used as engine alloys. Titanium alloys were first used in aircraft as engine alloys, but they have subsequently found a progressively increasing use in the aircraft structure. Titanium alloys constitute 20% of the airframe mass in some fighter aircraft, as compared to 5-7% in most aircraft.
from: http://ezinearticles.com/?Titanium-Alloys&id=5244980
