total categories   -MARINE GEARBOX    |-under 100 horsepower    |-100-500 horsepower    |-500-1500 horsepower    |-1000 horsepower    |-LESS THAN 100HP    |-100-500HP    |-500-1500HP    |-MORE THAN 1000HP   -PUMP GEARBOX   -Industrial gear case    |-single screw extruder deceleration    |-two screw extruder deceleration   -Direct current motor series   -OTHERS    |-metallurgical rolling mills   -drive shift transmission