| 摘要 |
-12 Disclosed herein is a rail trolley adapted to be received within a channel of a supporting rail. The trolley comprises primary rollers mounted inline on a body for 5 rolling on a lower surface of the supporting rail within the channel, and at least one secondary smaller roller mounted offset on the body but protruding beyond the upper extremities of the primary rollers for limiting rocking motion orthogonal to the direction of rolling. Also disclosed is a supporting rail system, |
