| 摘要 |
The apparatus comprises a generally cylindrical or sleeve-like or tubular housing 2 having an opening at one end which is locatable to be in sealing engagement with the outer surface of part of the hull 3 of a submarine with said housing 2 forming a water evacuable space around the propulsor unit 1 of the submarine, and access passages or ducts 4,5 for work personnel in communication with said space and extending upwardly from said housing 2 such as to, in use, to be above the surface of the water in which the submarine is floating.
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