#kordi
2 منشور
التكتنولوجيا عصرنا الحاضر
ارشد شمر • منذ سنة
While flares have been used for navigation and other purposes for a long time, the modern signal flare was first produced by a businesswoman and inventor named Martha Coston. Patented in 1859, the prototype was based on designs left behind by her deceased husband. Coston flares were made of colored paper tubes filled with chemicals that produced bright, colorful flares when lit, massively improving upon its predecessors in both longevity and brightness. #kordi #kurdistan
1 اعجاب
نسخ الرابط