… Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, …
Explanatory notes
… - Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, … include : (1) Articles which, unlike the refractory products of heading 69.02 , are in many cases not permanent fixtures, such as retorts, reaction vessels, crucibles, cupels and …