มาแล้ว หวยแม่จำเนียร งวด 16/5/62 จัดไปเน้นๆ แม่นจริงๆ
Many aviation establishments have set up definitions of lightweight, slow-flying airplanes that could be subject to minimum regulation. The resulting airplanes are normally called ultralight or microlight, although the weight and speed limits differ from country to country. This started during the late 1970s and early 1980s when people wanted to fly cheaply.
from: http://ezinearticles.com/?Ultralight-Aviation&id=2237789
