… Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods, …
Explanatory notes
… 69.02 - Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods, … by weight, singly or together, more than 50 % of the elements Mg, Ca or Cr, or expressed as MgO, CaO or Cr 2 O 3 … on one face and rectilinear on the others) even if they are clearly recognisable as being of the kind specially designed …