2.23. "Nominal aspect ratio (Ra)" means the centuple of the number obtained by dividing the number expressing the section height in mm by the number expressing the nominal section width in mm; a7c0
2.20. "Nominal aspect ratio (Ra)" means the centuple of the number obtained by dividing the number expressing the section height in mm by the number expressing the nominal section width in mm; a4c0
2.17. "Nominal aspect ratio (Ra)" means the centuple of the number obtained by dividing the number expressing the section height in mm by the number expressing the nominal section width in mm; a3c0
2.15. "Nominal aspect ratio (Ra)" means the centuple of the number obtained by dividing the number expressing the section height in mm by the number expressing the nominal section width in mm; a0c0