a flat board with underlying wheels used to inspect the underside of a vehicle
a padded frame with wheels that you can lay on and roll under your car with while you work
A platform on wheels that allows you to move around easily while lying on your back when you work under your car.
A board equipped with wheels on which a skydiver lays to simulate freefall maneuvers.
A small, four-wheeled platform that allows a mechanic to move underneath a car in order to perform checkups and repairs.
Low platform with wheels that is used for a person to lie on and slide under a machine or automobile.