 roba-tyred mobile ngwepịa osisi a ọhụrụ ụdị ngwá mepụtara na ndabere nke afọ nke onwe ha nnyocha na mmepe na nichepụta ahụmahụ nke wheel mobile ngwepịa osisi, roba-tyred mobile ngwepịa osisi ikpokọta na ọhụrụ ọrụ choro. 