มาแล้ว!! เลขเด็ด หวยชัวร์ล่าง วิ่งล่าง งวดประจำวันที่ 16 เมษายน 2562
When a unique product or service is found to be marketable, it soon goes from being offered by one company to being offered by numerous companies, spawning an "industry". Often, an industry results from a product or service's fulfillment of a need; however, industries can also result from products and services that fulfill our wants and dreams, such as our desire for great adventure, an example of which can be seen in the aviation adventure industry.
from: http://ezinearticles.com/?What-is-the-Aviation-Adventure-Industry?&id=3549448
