| 摘要 |
The insulating lining pieces for bulls eyes are circular or oval and are inserted in the space (15) which has been left for this, to improve the resistance to rainwater and to fix the bulls eye in position on site by a simple system of adjustment (23/24). The lining consists of similar, stackable and waterproof wooden sections (1,2 or 3) which are joined together by internal screws (16). In a groove (17) there are a series of preformed feet (4) which are screwed (19) to the frame (14). In the sliding area (15) there is horizontal seal (12). The lining is watertight in the horizontal space (15), alternatively the vertical watertightness (11) can be ensured by the application of a wooden band (13) fixed to the outside of the lining (1).
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