Manufacture of refractory products
This class includes :
Manufacture of refractory mortars, concretes etc.
Manufacture of refractory ceramic goods :
heat-insulating ceramic goods of siliceous fossil meals
refractory bricks, blocks and tiles, etc.
retorts, crucibles, muffles, nozzles, tubes, pipes, etc.
Manufacture of refractory articles containing magnesite, dolomite or chromite |