101S Hydraulic Tractor Steering Gear Control Units
https://www.dxvanepump.com/product/hydraulic-motor/101s-hydraulic-tractor-steering-gear-control-units.html
The 101S hydraulic steering gear enables the operation of steering cylinders with large resistance to be controlled with a small input force; it features easy, flexible operation, along with safety and reliability. The integrated check valve can prevent reverse flow of pressure oil in the system and avoid the "hand shock" phenomenon during operation.

It allows for easy steering control even in systems with high resistance, minimizing the effort required by the operator. This reduces operator fatigue and improves overall ease of use, especially in heavy-duty equipment or machinery.