What's the name of the photographic rail car?

Track sliding camera car. The track sliding camera car can slide smoothly on the track, providing a flexible and stable shooting platform for photographers. The rail slide shooting car is a special rail car specially designed for shooting moving shots. It consists of metal or wooden workbench, concave hard rubber round wheel with bearing, push handle and other parts. When in use, the concave wheel is stuck on the moving track and manually pushed to run smoothly along the track, which provides a stable and flexible shooting platform for photographers and realizes the effect of moving the lens more and more smoothly.