Explanatory notes
… cross-section (V-belts), V-ribbed, of an outside circumference exceeding 60 cm but not exceeding 180 cm … cross-section (V-belts), other than V‑ribbed, of an outside circumference exceeding 60 cm but not exceeding 180 cm … may be of rectangular, trapezoidal (V‑belts and V‑belting), circular or other cross‑section. Belts or belting of …