… plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths. …
Explanatory notes
… plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths (+). … (Al 2 O 3 ) or of a mixture or compound of alumina and of silica (SiO 2 ) 6903.90 - Other This heading covers all …