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