… crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than …
Explanatory notes
… crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than … runways in the form of half-cylinders) and angles, bends and similar tube or pipe fittings, even if intended …