1. Piston Ring

**Definition:** A metallic split ring that fits into a groove on the outer diameter of a piston. It is crucial for creating a seal between the piston and the cylinder wall.                    
                   **Location:** Installed on the piston inside the engine cylinder.                    
                   **Example:** Sandvik DT1131i Engine Piston Ring (EN: Sandvik DT1131i Engine Piston Ring; RU: Поршневое кольцо двигателя Sandvik DT1131i)

2. Rock Drill Piston

**Definition:** A key component in hydraulic rock drills that generates powerful impacts to break rock. It moves rapidly back and forth, transferring energy to the drill steel.                    
                   **Location:** Inside the rock drill assembly.                    
                   **Example:** Epiroc Boomer L2C Rock Drill Piston (EN: Epiroc Boomer L2C Rock Drill Piston; RU: Поршень буровой машины Epiroc Boomer L2C)

3. Separator Element

**Definition:** A part in an air compressor's oil separation system that removes oil mist from the compressed air, ensuring clean air output.                    
                   **Location:** Housed within the oil separator tank of a compressor.                    
                   **Example:** Atlas Copco GA75 Compressor Separator Element (EN: Atlas Copco GA75 Compressor Separator Element; RU: Сепараторный элемент компрессора Atlas Copco GA75)

4. Undercarriage Track Link

**Definition:** The chain-like structure that forms the track of a tracked vehicle like an excavator or bulldozer. It provides mobility and distributes the machine's weight.                    
                   **Location:** Forms the track chain on the undercarriage.                    
                   **Example:** Sandvik LH517 Undercarriage Track Link (EN: Sandvik LH517 Undercarriage Track Link; RU: Звено гусеничной цепи Sandvik LH517)

5. Hydraulic Hose

**Definition:** A flexible pipe used to transport hydraulic fluid under high pressure between different components of a hydraulic system.                    
                   **Location:** Connects various hydraulic components like pumps, cylinders, and valves.                    
                   **Example:** Atlas Copco PowerROC D45 Hydraulic Hose (EN: Atlas Copco PowerROC D45 Hydraulic Hose; RU: Гидравлический шланг Atlas Copco PowerROC D45)

6. Jaw Plate

**Definition:** A wear part in a jaw crusher that provides the crushing surface. It is designed to withstand the immense pressure and abrasion of crushing rock.                    
                   **Location:** Inside the crushing chamber of a jaw crusher.                    
                   **Example:** Sandvik QJ341 Jaw Plate (EN: Sandvik QJ341 Jaw Plate; RU: Дробильная плита Sandvik QJ341)

7. Cylinder Head

**Definition:** The top cover of an engine cylinder that seals the combustion chamber and contains the valves and fuel injectors.                    
                   **Location:** On top of the engine block.                    
                   **Example:** Epiroc SmartROC D65 Cylinder Head (EN: Epiroc SmartROC D65 Cylinder Head; RU: Головка блока цилиндров Epiroc SmartROC D65)

8. Engine Fan Blade

**Definition:** A cooling system component that draws air through the radiator to prevent the engine from overheating.                    
                   **Location:** Mounted on the engine's water pump shaft or a separate motor.                    
                   **Example:** Atlas Copco ROC L6 Engine Fan Blade (EN: Atlas Copco ROC L6 Engine Fan Blade; RU: Лопасть вентилятора двигателя Atlas Copco ROC L6)

9. Air Filter

**Definition:** A filter that cleans the air entering the engine's combustion chamber, preventing dust and debris from causing damage.                    
                   **Location:** Housed in the air intake system.                    
                   **Example:** Sandvik DQ450 Air Filter (EN: Sandvik DQ450 Air Filter; RU: Воздушный фильтр Sandvik DQ450)

10. Main Control Valve

**Definition:** A key component in a hydraulic system that directs the flow of hydraulic fluid to various actuators like cylinders and motors, controlling the machine's movements.                    
                   **Location:** In the hydraulic system, usually near the pump.                    
                   **Example:** Epiroc FlexiROC T40 Main Control Valve (EN: Epiroc FlexiROC T40 Main Control Valve; RU: Главный управляющий клапан Epiroc FlexiROC T40)