给出了通气管和潜望镜观察系统组合应用的实例。

Examples of snorkel-periscope system combination applications are given.

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当时天色昏暗，难以用潜望镜观察，而潜艇的听音设备也坏了。

The failing light was such that observation by periscope could not be relied on, and the Upholder's listening gear was out of order.

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芬兰工作室OOPEAA设计了这座湖边的观察亭，它是大型潜望镜的两倍，所以游客不必爬到山顶欣赏风景。

This lakeside observation pavilion by Finnish studio OOPEAA doubles as a giant periscope, so visitors don't have to climb to the top to enjoy the view.

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