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