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مشاهدة النسخة كاملة : Solar plane aiming for stratosphere makes test flight


BECKHAM
05-05-2017, 10:45 PM
The first solar plane aimed at reaching the stratosphere made an initial low-altitude test flight over Switzerland on Friday.

for more... (https://www.thelocal.ch/20170505/solar-plane-aiming-for-stratosphere-makes-test-flight)