【2ch】チラシの裏【書き込み規制】

2c86db0c anonymous 2023-02-05 15:36: >>de06b522
補足しとくと恐らく変温層の計測をしてる
潜水艦が変温層の下に潜り込むと温度差で音波が反射したりして聞こえにくくなる

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