| 摘要 |
The cover 12, resembling a slatted roller blind, for installation pits substantially comprises a plurality of supporting beams 1, which are connected by a link chain 2. The chain links are arranged, in each case, at the gap between the supporting beams. The supporting beams rest on the plastic bearing surface 13 of the rail 11. The rollers 8 serve only to provide guidance in the guides 10. The cover can be moved by pushing, the pushing force being initiated via the link chain 2. <IMAGE>
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