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Air casters require a smooth, non-porous,sealed ground.Cracks and other surface
defects can interrupt the proper flow of air, Polyurethane floor is the ideal work surface
of Air Casters.
we can also use sheet metal or a heavy gauge plastic sheet material on the uneven
ground.
The ground should be dry enough,or the Air Casters could be too flexible to control.
An external air supply source is necessary.Rubb