قنوات يوتيوب مثل Corning Optical Communications



26,300 1.1%

10,300 1.42%

116,000 0.91%

760,000 1.68%


4,760,000 1.7%

10,500,000 3.02%

12,100 1.33%

157,000 2.62%

3,390,000 1.13%

9,550 1.28%

25,300 0.43%

223,000 2.58%

3,210,000 2.78%

5,700 2.72%



9,320 1.52%

9,980 1.04%

187,000 2.09%


11,200 3.95%