| 摘要 |
This invention concerns an underground transformer cabin consisting of two prefabricated vibrated reinforced concrete units (1,2), one inside the other; the external one (1) is enclosed by a covering plate (1a), while the smaller internal one (2) is raised off the floor of the external one and has a wide air space (3) around its sides and at the bottom, and in the floor of this smaller unit (2) there are windows (2a) or openings throught which fresh outdoor air is let into the smaller unit (2) from underneath and passes first over the transformer and then into an ascending pipe (6) which ends outside at a height greater than the height at which the fresh air inlet of the descending pipe (5) is positioned. <IMAGE>
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