 Ṣẹda ẹya ti o nira sii ti gbolohun yii Awọn Williams FW31 jẹ ọkọ ayọkẹlẹ Formula Ọkan, ti a ṣe apẹrẹ ati ti a ṣe nipasẹ WilliamsF1. : Àmọ, àdàkọ tí ó díjú jùlọ nínú gbólóhùn náà ni The Williams FW31 is a Formula One motor racing car, which Williams will use to compete in the 2009 Formula One season. 