Explanatory notes
… or similar siliceous earths (+). 6902.10 - Containing by weight, singly or together, more than 50 % of the elements … expressed as MgO, CaO or Cr 2 O 3 6902.20 - Containing by weight more than 50 % of alumina (Al 2 O 3 ), of silica (SiO … inter alia : (1) Bricks of all shapes (parallelepiped, wedge shaped, cylindrical, semi-cylindrical, etc.), …