| 摘要 |
At least one element is hinged to a retaining ring that supports the roof of an electric arc furnace, and is movable from an operative position over the roof to an inoperative position free of the roof. The individual bricks comprising the roof can be held up and/or held down by the hinged element when such is in its operative position, and means are provided for removably fixing the hinged element in its operative position.
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