DB01 Front One Way & Centre One Way
 

I know what a front 1 way does, but what about the centre one? And bought together? Does any one knows?

The centre oneway just allows the car to rotate in the corners a little better and brake on the rear only to help flick the car round if needed. It doesn't pull out of corners any different to a normal fixed 4WD layout.
Using both front and centre one ways together is just the same as running only a front one way.