… refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, …
Explanatory notes
… refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, … and similar articles for industrial or laboratory use, muffles, nozzles, plugs, burner jets and similar parts of …