| 摘要 |
A cleaning bullet for use m a track can include a compressible body to clean the track, and a motorized device to propel the body through the track In some embodiments, the motorized device includes wheels rotatably coupled to the device, a motor to drive the wheels, and a power source to supply power to the motor Also, m some embodiments, one or more wheels engage an inner or outer surface of the track to move the motorized device along the track. |
