Final answer:
Mechanized handling is often supplemented by hydraulic and mechanical lever systems in heavy machinery such as backhoes, wagons, cranes, and bulldozers.
Step-by-step explanation:
Mechanized handling is often supplemented by hydraulic and mechanical lever systems in heavy machinery. These systems use the power of hydraulic fluid or mechanical levers to assist in lifting, moving, and manipulating objects.
For example, backhoes, wagons, cranes, and bulldozers are equipped with hydraulic and mechanical lever systems. These systems provide additional force and control, making it easier and more efficient to handle heavy loads.