3532  Mining Machinery & Equipment, Except Oil & Gas Field
Machinery & Equipment

Establishments primarily engaged in manufacturing heavy machinery and
equipment used by the mining industries, such as coal breakers, mine cars,
mineral cleaning machinery, concentration machinery, core drills, coal
cutters, portable rock drills, and rock crushing machinery.  Establishments
primarily engaged in manufacturing construction machinery are classified in
industry 3531; those manufacturing welldrilling machinery are classified in
industry 3533; and those manufacturing coal and ore conveyors are
classified in industry 3535.