Tank/Reservoir: Holds the liquid chemical solution, typically 25 liters.
Gasoline Engine: Provides power to generate pressure for spraying.
Pump Unit: Pressurizes the liquid and forces it through the spray system.
Delivery Hose: Carries the pressurized liquid from the tank to the spray lance.
Spray Lance/Wand: Allows the operator to direct the spray onto plants or target areas.
Nozzle: Breaks the liquid into fine droplets for even coverage.
Harness/Straps: Enable the unit to be carried comfortably on the back.