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