The new Toyota TF106B does not have a keel, hence it is a zero keel design.
A keel is a part under the tub where the lower wishbones are connected to. In case of a zero keel, these wishbones connect directly to the tub.
For more info, check the all cars ever database on this site:
Toyota TF105B
Toyota TF106
Toyota TF106B
Further discussion on this new Toyota can be found here:
viewtopic.php?t=2518