单词	conning tower
释义	conning tower /ˈkɒnɪŋ ˌtaʊə / noun The superstructure of a submarine, from which it can be commanded when on the surface and which contains the periscope.As you descend, your first sight of the submarine will be a selection of masts and periscopes rising from the conning tower.... The introduction of a proper conning tower meant that the periscope could be kept in an upright position where it could be raised and lowered by the use of compressed air. There was the conning tower with the periscope easily identifiable inside; there were the access hatches.
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