Refractory ceramic constructional goods containing >50% of MgO, CaO or Cr2O3 including bricks, blocks and tiles excluding goods of siliceous fossil meals or earths, tubing and piping
Opeke, bloki, zidaki ipd. iz ognjevzdržne keramike, z utežnim deležem MgO, CaO ali Cr2O3 > 50 %