| 摘要 |
Provision of panels within casings 2 can cause problems where retaining bolts require apertures in the casings 2 which in turn may reduce the structural strength of that casing 2. By providing a loose or snug fit ring 4 placed within the casing 2 and appropriate retainer elements 5 secured to that ring 4 which in turn appropriately presents panels 6 it is possible to provide a casing arrangement 1 which avoids the necessity of drilling or otherwise forming holes in the casing which may reduce structural strength. The rings 4, retainers 5 and the panels 6 do not need to be mechanically fixed to the casing 2 although where possible a ring 4 may be secured through bolts in areas of the casing 2 where structural strength is less important. Where there is no bolting between the ring 4 and the casing 2 then dam elements 30, 40, 50 can be provided at each end of the arrangement 1 to prevent lateral axial movement and therefore retain panel 6 position within the casing 2. |
