I have no idea of how the Russians drop vehicles, but from my observations:
You can easily need four large parachutes on a vehicle, these need to be detached (hopefully in good enough condition to be repacked).
Then there is cushioning material between the platform and the vehicle, this needs to be dragged out. ( I once saw two air dispatchers unsuccessfully try to drive a dozer, for at least twenty minutes, off a platform that still had some cushioning material left)
And of course all the strapping that holds the vehicle to the platform, and the parachutes to the platform, most of that is just cut. But it's a combination of a lot of little stuff and some very strong stuff.'
Then there are parts of the vehicle tapped down and in some cases detached. There was a detailed manual for each vehicle type certified to be dropped, I believe.
So I guess maybe half an hour to retrieve the vehicle, if your lucky