| 摘要 |
A track set is provided. The track set includes a first track segment and a carriage. The first track segment has a first pivot and is rotatable about the first pivot from a first position to a second position. The carriage is rotationally coupled to an end of the first track segment by a second pivot. The carriage is configured to rotate about the second pivot as the first track segment rotates from the first position to the second position. |
