作为补偿，他们打算在竖直的钢梯顶部安置一个潜水艇的潜望镜，这个钢梯是通往原先过道出口的。
To compensate, they plan to install a submarine periscope at the top of the vertical steel ladder leading to the original access hatch.
作为补偿，他们打算在竖直的钢梯顶部安置一个潜水艇的潜望镜，这个钢梯是通往原先过道出口的。
To compensate, they plan to install a submarine periscope at the top of the vertical steel ladder leading to the original access hatch.
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