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upper rudder /ˌʌpə ˈmantəl/ n

中文：上方向舵

中文 · 上方向舵Español · timón de direcciónFrançais · gouvernail de direction
Meaning：Movable part that allows the submarine to stay on course and turn right and left.
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Found in these illustrated scenes（2）

Nuclear submarine Nuclear submarine interior

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