| 摘要 |
On a covering for an opening comprising a frame and a cover or grating, on the latter is provided an elastically deformable, rod-like closing member, which forms one part of a locking device, the other part thereof being a retaining member, which is a groove provided in frame, in which can engage a closing finger located on closing member, accompanied by the elastic deformation of the closing member. Thus, in simple manner, the cover or grating is positively secured in frame. |
