| 摘要 |
A fixed rail 20, an intermediate 22, and a sliding rail 24 are telescopically slidable on rolling bearings and have catches 52, 56, 54 to control relative movement of the rails 22, 24 so that, on pulling out, the rail 24 can be slid out of the rail 22 only when the rail 22 is fully pulled out, and so that, on pushing back, the rail 22 can be slid back into the rail 20 only after the rail 24 has been slid back into the rail 22. <IMAGE> |
