| 摘要 |
Roof for circular public enclosures, especially for bullrings, which consists of two independent portions, one being fixed and the other movable, both being shaped in the approximate form of circular sectors of different angular amplitude, with slightly conical, complementary outer surfaces. The fixed portion is mounted on the periphery of the enclosure. The movable portion is mounted via the vertex on the vertex of the fixed portion by means of a vertical-shaft rotary support, and via the circular periphery on a peripheral beam of identical outline, using rolling elements. <IMAGE>
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