The function of the switch is to turn the machine on and off.
The vehicle is powered by the engine.
The purpose of the wheel is to steer the truck.
The shelf is bolted to the wall with screws.
The purpose of the backup file is to keep our data safe.
The bridge is supported by steel pylons.
The airflow is regulated by the valve.
The engine powers the vehicle.
Screws bolt the shelf to the wall.
Steel pylons support the bridge.
The wheel steers the truck.
The backup file keeps our data safe.
The switch turns the machine on and off.
The valve regulates the airflow.
