2501 Diagram of shopping trolley.jpeg

脚轮 Castor

A travelator, also known as a moving walkway or moving sidewalk, is a horizontal or slightly inclined conveyor belt system designed to transport people over short to medium distances. It's commonly found in places like airports, train stations, and shopping centers to help people move more efficiently.

Shassis means the base frame of a car, carriage, or other wheeled vehicle.