Relacionar Columnas Talking About FunctionsVersión en línea Matching por Logos Sprachinstitut 1 The vehicle is powered by the engine. 2 The airflow is regulated by the valve. 3 The bridge is supported by steel pylons. 4 The purpose of the backup file is to keep our data safe. 5 The purpose of the wheel is to steer the truck. 6 The function of the switch is to turn the machine on and off. 7 The shelf is bolted to the wall with screws. The engine powers the vehicle. The backup file keeps our data safe. The switch turns the machine on and off. The valve regulates the airflow. Screws bolt the shelf to the wall. The wheel steers the truck. Steel pylons support the bridge.