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English Translations » 历史存档[信息] » Why does the plane fly in a straight line in the sky?

Why does the plane fly in a straight line in the sky?

2016-12-17View Original

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As the title says, I pulled it several times, back and forth
Reply #22016-12-17
This post was last edited by ylb913 on 2016-12-18 08:26. That’s all there is to know about jet planes; we can’t say exactly what tasks they are meant to carry out. Many of the helicopters in the sky are for civilian use; it’s not clear about the jet ones.
Reply #32016-12-17
It seems that only jet planes have this, right? Isn’t it the trace left by the gases being expelled?

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Translated at 2026-07-20 22:39:13

Original: https://bbs.hcbbs.com/thread-1652890-1-1.html

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