H

Porcelain laboratory equipment, namely, [ mortars, pestles, vaporizing dishes, roasting dishes, melting pots, filtering pots, filter plates, plates, funnels, ] pebble mills, [ grinding clips, ladle spatulas, ] and boats, all used for thermal processing in laboratories in a wide variety of industries; thermocouples; thermocouple sheaths

Refractory parts of heating apparatus, namely, refractory furnaces; kiln furniture; support shapes, namely, supports used in kilns; firing supports used in kilns; rods for use in refractory furnaces and kilns; tubes for use in kilns; beams for use in kilns; rollers for use in kilns [ ; burner elements in the nature of heating elements ]