Industrial or laboratory furnaces and ovens, including incinerators, nonelectric
Bakery ovens, incl. biscuit ovens, nonelectric
Industrial or laboratory furnaces and ovens, nonelectric, for the roasting, melting or other heat treatment of ores, pyrites or metals (excl. drying ovens)
Industrial or laboratory furnaces and ovens, nonelectric, incl. incinerators (excl. those for the roasting, melting or other heat treatment of ores, pyrites or metals, bakery ovens, drying ovens and ovens for cracking operations)
Parts of industrial or laboratory furnaces, nonelectric, incl. incinerators, n.e.s.