Which device is specifically designed to move heavier loads using a hydraulic mechanism?

The pallet truck is specifically designed to move heavier loads using a hydraulic mechanism. Its main function is to transport pallets of goods within warehouses or shipping docks, eliminating the need for manual lifting that can lead to injuries. The hydraulic system allows the operator to easily lift and lower loaded pallets with minimal effort, making it efficient for handling heavy loads.

In contrast, the other devices mentioned serve different purposes: order picking trolleys are designed for collecting various items from shelves for order fulfillment but are not specialized for heavy loads; dollies are typically used for moving small, bulk items and can lack the hydraulic capability; and hand trucks, while helpful for moving boxes or smaller loads, rely more on leverage and do not possess the same hydraulic lifting mechanism found in pallet trucks.