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